diff --git a/src/client/mysql_admutils_compatibility/error_messages.rs b/src/client/mysql_admutils_compatibility/error_messages.rs
index f5da3a6..fa393c4 100644
--- a/src/client/mysql_admutils_compatibility/error_messages.rs
+++ b/src/client/mysql_admutils_compatibility/error_messages.rs
@@ -1,12 +1,15 @@
-use crate::core::protocol::{
-    CreateDatabaseError, CreateUserError, DropDatabaseError, DropUserError,
-    GetDatabasesPrivilegeDataError, ListUsersError, request_validation::DbOrUser,
+use crate::core::{
+    protocol::{
+        CreateDatabaseError, CreateUserError, DropDatabaseError, DropUserError,
+        GetDatabasesPrivilegeDataError, ListUsersError,
+    },
+    types::DbOrUser,
 };
 
-pub fn name_validation_error_to_error_message(name: &str, db_or_user: DbOrUser) -> String {
+pub fn name_validation_error_to_error_message(db_or_user: DbOrUser) -> String {
     let argv0 = std::env::args().next().unwrap_or_else(|| match db_or_user {
-        DbOrUser::Database => "mysql-dbadm".to_string(),
-        DbOrUser::User => "mysql-useradm".to_string(),
+        DbOrUser::Database(_) => "mysql-dbadm".to_string(),
+        DbOrUser::User(_) => "mysql-useradm".to_string(),
     });
 
     format!(
@@ -15,16 +18,16 @@ pub fn name_validation_error_to_error_message(name: &str, db_or_user: DbOrUser)
             "Only A-Z, a-z, 0-9, _ (underscore) and - (dash) permitted. Skipping.",
         ),
         argv0,
-        db_or_user.capitalized(),
-        name,
+        db_or_user.capitalized_noun(),
+        db_or_user.name(),
     )
 }
 
-pub fn owner_validation_error_message(name: &str, db_or_user: DbOrUser) -> String {
+pub fn owner_validation_error_message(db_or_user: DbOrUser) -> String {
     format!(
         "You are not in charge of mysql-{}: '{}'.  Skipping.",
-        db_or_user.lowercased(),
-        name
+        db_or_user.lowercased_noun(),
+        db_or_user.name(),
     )
 }
 
@@ -36,11 +39,14 @@ pub fn handle_create_user_error(error: CreateUserError, name: &str) {
         CreateUserError::SanitizationError(_) => {
             eprintln!(
                 "{}",
-                name_validation_error_to_error_message(name, DbOrUser::User)
+                name_validation_error_to_error_message(DbOrUser::User(name.into()))
             );
         }
         CreateUserError::OwnershipError(_) => {
-            eprintln!("{}", owner_validation_error_message(name, DbOrUser::User));
+            eprintln!(
+                "{}",
+                owner_validation_error_message(DbOrUser::User(name.into()))
+            );
         }
         CreateUserError::MySqlError(_) | CreateUserError::UserAlreadyExists => {
             eprintln!("{}: Failed to create user '{}'.", argv0, name);
@@ -56,11 +62,14 @@ pub fn handle_drop_user_error(error: DropUserError, name: &str) {
         DropUserError::SanitizationError(_) => {
             eprintln!(
                 "{}",
-                name_validation_error_to_error_message(name, DbOrUser::User)
+                name_validation_error_to_error_message(DbOrUser::User(name.into()))
             );
         }
         DropUserError::OwnershipError(_) => {
-            eprintln!("{}", owner_validation_error_message(name, DbOrUser::User));
+            eprintln!(
+                "{}",
+                owner_validation_error_message(DbOrUser::User(name.into()))
+            );
         }
         DropUserError::MySqlError(_) | DropUserError::UserDoesNotExist => {
             eprintln!("{}: Failed to delete user '{}'.", argv0, name);
@@ -76,11 +85,14 @@ pub fn handle_list_users_error(error: ListUsersError, name: &str) {
         ListUsersError::SanitizationError(_) => {
             eprintln!(
                 "{}",
-                name_validation_error_to_error_message(name, DbOrUser::User)
+                name_validation_error_to_error_message(DbOrUser::User(name.into()))
             );
         }
         ListUsersError::OwnershipError(_) => {
-            eprintln!("{}", owner_validation_error_message(name, DbOrUser::User));
+            eprintln!(
+                "{}",
+                owner_validation_error_message(DbOrUser::User(name.into()))
+            );
         }
         ListUsersError::UserDoesNotExist => {
             eprintln!(
@@ -104,13 +116,13 @@ pub fn handle_create_database_error(error: CreateDatabaseError, name: &str) {
         CreateDatabaseError::SanitizationError(_) => {
             eprintln!(
                 "{}",
-                name_validation_error_to_error_message(name, DbOrUser::Database)
+                name_validation_error_to_error_message(DbOrUser::Database(name.into()))
             );
         }
         CreateDatabaseError::OwnershipError(_) => {
             eprintln!(
                 "{}",
-                owner_validation_error_message(name, DbOrUser::Database)
+                owner_validation_error_message(DbOrUser::Database(name.into()))
             );
         }
         CreateDatabaseError::MySqlError(_) => {
@@ -130,13 +142,13 @@ pub fn handle_drop_database_error(error: DropDatabaseError, name: &str) {
         DropDatabaseError::SanitizationError(_) => {
             eprintln!(
                 "{}",
-                name_validation_error_to_error_message(name, DbOrUser::Database)
+                name_validation_error_to_error_message(DbOrUser::Database(name.into()))
             );
         }
         DropDatabaseError::OwnershipError(_) => {
             eprintln!(
                 "{}",
-                owner_validation_error_message(name, DbOrUser::Database)
+                owner_validation_error_message(DbOrUser::Database(name.into()))
             );
         }
         DropDatabaseError::MySqlError(_) => {
@@ -158,10 +170,10 @@ pub fn format_show_database_error_message(
 
     match error {
         GetDatabasesPrivilegeDataError::SanitizationError(_) => {
-            name_validation_error_to_error_message(name, DbOrUser::Database)
+            name_validation_error_to_error_message(DbOrUser::Database(name.into()))
         }
         GetDatabasesPrivilegeDataError::OwnershipError(_) => {
-            owner_validation_error_message(name, DbOrUser::Database)
+            owner_validation_error_message(DbOrUser::Database(name.into()))
         }
         GetDatabasesPrivilegeDataError::MySqlError(err) => {
             format!(
diff --git a/src/core/protocol/commands/create_databases.rs b/src/core/protocol/commands/create_databases.rs
index 27f6f03..1ba2125 100644
--- a/src/core/protocol/commands/create_databases.rs
+++ b/src/core/protocol/commands/create_databases.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 use serde_json::json;
 
 use crate::core::{
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::MySQLDatabase,
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLDatabase},
 };
 
 pub type CreateDatabasesRequest = Vec<MySQLDatabase>;
@@ -60,10 +60,10 @@ impl CreateDatabaseError {
     pub fn to_error_message(&self, database_name: &MySQLDatabase) -> String {
         match self {
             CreateDatabaseError::SanitizationError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             CreateDatabaseError::OwnershipError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             CreateDatabaseError::DatabaseAlreadyExists => {
                 format!("Database {} already exists.", database_name)
diff --git a/src/core/protocol/commands/create_users.rs b/src/core/protocol/commands/create_users.rs
index 392dccd..9ca3535 100644
--- a/src/core/protocol/commands/create_users.rs
+++ b/src/core/protocol/commands/create_users.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 use serde_json::json;
 
 use crate::core::{
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::MySQLUser,
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLUser},
 };
 
 pub type CreateUsersRequest = Vec<MySQLUser>;
@@ -60,9 +60,11 @@ impl CreateUserError {
     pub fn to_error_message(&self, username: &MySQLUser) -> String {
         match self {
             CreateUserError::SanitizationError(err) => {
-                err.to_error_message(username, DbOrUser::User)
+                err.to_error_message(DbOrUser::User(username.clone()))
+            }
+            CreateUserError::OwnershipError(err) => {
+                err.to_error_message(DbOrUser::User(username.clone()))
             }
-            CreateUserError::OwnershipError(err) => err.to_error_message(username, DbOrUser::User),
             CreateUserError::UserAlreadyExists => {
                 format!("User '{}' already exists.", username)
             }
diff --git a/src/core/protocol/commands/drop_databases.rs b/src/core/protocol/commands/drop_databases.rs
index daba6bf..063c0e8 100644
--- a/src/core/protocol/commands/drop_databases.rs
+++ b/src/core/protocol/commands/drop_databases.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 use serde_json::json;
 
 use crate::core::{
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::MySQLDatabase,
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLDatabase},
 };
 
 pub type DropDatabasesRequest = Vec<MySQLDatabase>;
@@ -63,10 +63,10 @@ impl DropDatabaseError {
     pub fn to_error_message(&self, database_name: &MySQLDatabase) -> String {
         match self {
             DropDatabaseError::SanitizationError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             DropDatabaseError::OwnershipError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             DropDatabaseError::DatabaseDoesNotExist => {
                 format!("Database {} does not exist.", database_name)
diff --git a/src/core/protocol/commands/drop_users.rs b/src/core/protocol/commands/drop_users.rs
index 83cdaf0..609690d 100644
--- a/src/core/protocol/commands/drop_users.rs
+++ b/src/core/protocol/commands/drop_users.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 use serde_json::json;
 
 use crate::core::{
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::MySQLUser,
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLUser},
 };
 
 pub type DropUsersRequest = Vec<MySQLUser>;
@@ -59,8 +59,12 @@ pub fn print_drop_users_output_status_json(output: &DropUsersResponse) {
 impl DropUserError {
     pub fn to_error_message(&self, username: &MySQLUser) -> String {
         match self {
-            DropUserError::SanitizationError(err) => err.to_error_message(username, DbOrUser::User),
-            DropUserError::OwnershipError(err) => err.to_error_message(username, DbOrUser::User),
+            DropUserError::SanitizationError(err) => {
+                err.to_error_message(DbOrUser::User(username.clone()))
+            }
+            DropUserError::OwnershipError(err) => {
+                err.to_error_message(DbOrUser::User(username.clone()))
+            }
             DropUserError::UserDoesNotExist => {
                 format!("User '{}' does not exist.", username)
             }
diff --git a/src/core/protocol/commands/list_databases.rs b/src/core/protocol/commands/list_databases.rs
index 470a381..2c36a5b 100644
--- a/src/core/protocol/commands/list_databases.rs
+++ b/src/core/protocol/commands/list_databases.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 
 use crate::{
     core::{
-        protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-        types::MySQLDatabase,
+        protocol::request_validation::{NameValidationError, OwnerValidationError},
+        types::{DbOrUser, MySQLDatabase},
     },
     server::sql::database_operations::DatabaseRow,
 };
@@ -26,10 +26,10 @@ impl ListDatabasesError {
     pub fn to_error_message(&self, database_name: &MySQLDatabase) -> String {
         match self {
             ListDatabasesError::SanitizationError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             ListDatabasesError::OwnershipError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             ListDatabasesError::DatabaseDoesNotExist => {
                 format!("Database '{}' does not exist.", database_name)
diff --git a/src/core/protocol/commands/list_privileges.rs b/src/core/protocol/commands/list_privileges.rs
index 8208f29..ae96f36 100644
--- a/src/core/protocol/commands/list_privileges.rs
+++ b/src/core/protocol/commands/list_privileges.rs
@@ -8,8 +8,8 @@ use serde::{Deserialize, Serialize};
 
 use crate::core::{
     database_privileges::DatabasePrivilegeRow,
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::MySQLDatabase,
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLDatabase},
 };
 
 pub type ListPrivilegesRequest = Option<Vec<MySQLDatabase>>;
@@ -29,10 +29,10 @@ impl GetDatabasesPrivilegeDataError {
     pub fn to_error_message(&self, database_name: &MySQLDatabase) -> String {
         match self {
             GetDatabasesPrivilegeDataError::SanitizationError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             GetDatabasesPrivilegeDataError::OwnershipError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             GetDatabasesPrivilegeDataError::DatabaseDoesNotExist => {
                 format!("Database '{}' does not exist.", database_name)
diff --git a/src/core/protocol/commands/list_users.rs b/src/core/protocol/commands/list_users.rs
index 9d12d83..d75b0a1 100644
--- a/src/core/protocol/commands/list_users.rs
+++ b/src/core/protocol/commands/list_users.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 
 use crate::{
     core::{
-        protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-        types::MySQLUser,
+        protocol::request_validation::{NameValidationError, OwnerValidationError},
+        types::{DbOrUser, MySQLUser},
     },
     server::sql::user_operations::DatabaseUser,
 };
@@ -26,9 +26,11 @@ impl ListUsersError {
     pub fn to_error_message(&self, username: &MySQLUser) -> String {
         match self {
             ListUsersError::SanitizationError(err) => {
-                err.to_error_message(username, DbOrUser::User)
+                err.to_error_message(DbOrUser::User(username.clone()))
+            }
+            ListUsersError::OwnershipError(err) => {
+                err.to_error_message(DbOrUser::User(username.clone()))
             }
-            ListUsersError::OwnershipError(err) => err.to_error_message(username, DbOrUser::User),
             ListUsersError::UserDoesNotExist => {
                 format!("User '{}' does not exist.", username)
             }
diff --git a/src/core/protocol/commands/lock_users.rs b/src/core/protocol/commands/lock_users.rs
index 7c79670..1b25f85 100644
--- a/src/core/protocol/commands/lock_users.rs
+++ b/src/core/protocol/commands/lock_users.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 use serde_json::json;
 
 use crate::core::{
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::MySQLUser,
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLUser},
 };
 
 pub type LockUsersRequest = Vec<MySQLUser>;
@@ -60,8 +60,12 @@ pub fn print_lock_users_output_status_json(output: &LockUsersResponse) {
 impl LockUserError {
     pub fn to_error_message(&self, username: &MySQLUser) -> String {
         match self {
-            LockUserError::SanitizationError(err) => err.to_error_message(username, DbOrUser::User),
-            LockUserError::OwnershipError(err) => err.to_error_message(username, DbOrUser::User),
+            LockUserError::SanitizationError(err) => {
+                err.to_error_message(DbOrUser::User(username.clone()))
+            }
+            LockUserError::OwnershipError(err) => {
+                err.to_error_message(DbOrUser::User(username.clone()))
+            }
             LockUserError::UserDoesNotExist => {
                 format!("User '{}' does not exist.", username)
             }
diff --git a/src/core/protocol/commands/modify_privileges.rs b/src/core/protocol/commands/modify_privileges.rs
index df70f72..58d894a 100644
--- a/src/core/protocol/commands/modify_privileges.rs
+++ b/src/core/protocol/commands/modify_privileges.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 
 use crate::core::{
     database_privileges::{DatabasePrivilegeRow, DatabasePrivilegeRowDiff, DatabasePrivilegesDiff},
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::{MySQLDatabase, MySQLUser},
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLDatabase, MySQLUser},
 };
 
 pub type ModifyPrivilegesRequest = BTreeSet<DatabasePrivilegesDiff>;
@@ -54,16 +54,16 @@ impl ModifyDatabasePrivilegesError {
     pub fn to_error_message(&self, database_name: &MySQLDatabase, username: &MySQLUser) -> String {
         match self {
             ModifyDatabasePrivilegesError::DatabaseSanitizationError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             ModifyDatabasePrivilegesError::DatabaseOwnershipError(err) => {
-                err.to_error_message(database_name, DbOrUser::Database)
+                err.to_error_message(DbOrUser::Database(database_name.clone()))
             }
             ModifyDatabasePrivilegesError::UserSanitizationError(err) => {
-                err.to_error_message(username, DbOrUser::User)
+                err.to_error_message(DbOrUser::User(username.clone()))
             }
             ModifyDatabasePrivilegesError::UserOwnershipError(err) => {
-                err.to_error_message(username, DbOrUser::User)
+                err.to_error_message(DbOrUser::User(username.clone()))
             }
             ModifyDatabasePrivilegesError::DatabaseDoesNotExist => {
                 format!("Database '{}' does not exist.", database_name)
diff --git a/src/core/protocol/commands/passwd_user.rs b/src/core/protocol/commands/passwd_user.rs
index 1efb703..8ee97e1 100644
--- a/src/core/protocol/commands/passwd_user.rs
+++ b/src/core/protocol/commands/passwd_user.rs
@@ -1,8 +1,8 @@
 use serde::{Deserialize, Serialize};
 
 use crate::core::{
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::MySQLUser,
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLUser},
 };
 
 pub type SetUserPasswordRequest = (MySQLUser, String);
@@ -33,9 +33,11 @@ impl SetPasswordError {
     pub fn to_error_message(&self, username: &MySQLUser) -> String {
         match self {
             SetPasswordError::SanitizationError(err) => {
-                err.to_error_message(username, DbOrUser::User)
+                err.to_error_message(DbOrUser::User(username.clone()))
+            }
+            SetPasswordError::OwnershipError(err) => {
+                err.to_error_message(DbOrUser::User(username.clone()))
             }
-            SetPasswordError::OwnershipError(err) => err.to_error_message(username, DbOrUser::User),
             SetPasswordError::UserDoesNotExist => {
                 format!("User '{}' does not exist.", username)
             }
diff --git a/src/core/protocol/commands/unlock_users.rs b/src/core/protocol/commands/unlock_users.rs
index 5356972..bbad4e4 100644
--- a/src/core/protocol/commands/unlock_users.rs
+++ b/src/core/protocol/commands/unlock_users.rs
@@ -4,8 +4,8 @@ use serde::{Deserialize, Serialize};
 use serde_json::json;
 
 use crate::core::{
-    protocol::request_validation::{DbOrUser, NameValidationError, OwnerValidationError},
-    types::MySQLUser,
+    protocol::request_validation::{NameValidationError, OwnerValidationError},
+    types::{DbOrUser, MySQLUser},
 };
 
 pub type UnlockUsersRequest = Vec<MySQLUser>;
@@ -61,9 +61,11 @@ impl UnlockUserError {
     pub fn to_error_message(&self, username: &MySQLUser) -> String {
         match self {
             UnlockUserError::SanitizationError(err) => {
-                err.to_error_message(username, DbOrUser::User)
+                err.to_error_message(DbOrUser::User(username.clone()))
+            }
+            UnlockUserError::OwnershipError(err) => {
+                err.to_error_message(DbOrUser::User(username.clone()))
             }
-            UnlockUserError::OwnershipError(err) => err.to_error_message(username, DbOrUser::User),
             UnlockUserError::UserDoesNotExist => {
                 format!("User '{}' does not exist.", username)
             }
diff --git a/src/core/protocol/request_validation.rs b/src/core/protocol/request_validation.rs
index d93c34b..2d834f3 100644
--- a/src/core/protocol/request_validation.rs
+++ b/src/core/protocol/request_validation.rs
@@ -2,31 +2,7 @@ use indoc::indoc;
 use itertools::Itertools;
 use serde::{Deserialize, Serialize};
 
-use crate::core::common::UnixUser;
-
-/// This enum is used to differentiate between database and user operations.
-/// Their output are very similar, but there are slight differences in the words used.
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
-pub enum DbOrUser {
-    Database,
-    User,
-}
-
-impl DbOrUser {
-    pub fn lowercased(&self) -> &'static str {
-        match self {
-            DbOrUser::Database => "database",
-            DbOrUser::User => "user",
-        }
-    }
-
-    pub fn capitalized(&self) -> &'static str {
-        match self {
-            DbOrUser::Database => "Database",
-            DbOrUser::User => "User",
-        }
-    }
-}
+use crate::core::{common::UnixUser, types::DbOrUser};
 
 #[derive(Debug, PartialEq, Eq, Clone, Copy, Serialize, Deserialize)]
 pub enum NameValidationError {
@@ -36,14 +12,14 @@ pub enum NameValidationError {
 }
 
 impl NameValidationError {
-    pub fn to_error_message(self, name: &str, db_or_user: DbOrUser) -> String {
+    pub fn to_error_message(self, db_or_user: DbOrUser) -> String {
         match self {
             NameValidationError::EmptyString => {
-                format!("{} name cannot be empty.", db_or_user.capitalized()).to_owned()
+                format!("{} name cannot be empty.", db_or_user.capitalized_noun()).to_owned()
             }
             NameValidationError::TooLong => format!(
                 "{} is too long. Maximum length is 64 characters.",
-                db_or_user.capitalized()
+                db_or_user.capitalized_noun()
             )
             .to_owned(),
             NameValidationError::InvalidCharacters => format!(
@@ -52,8 +28,8 @@ impl NameValidationError {
 
                   Only A-Z, a-z, 0-9, _ (underscore) and - (dash) are permitted.
                 "#},
-                db_or_user.lowercased(),
-                name
+                db_or_user.lowercased_noun(),
+                db_or_user.name(),
             )
             .to_owned(),
         }
@@ -61,7 +37,7 @@ impl NameValidationError {
 }
 
 impl OwnerValidationError {
-    pub fn to_error_message(self, name: &str, db_or_user: DbOrUser) -> String {
+    pub fn to_error_message(self, db_or_user: DbOrUser) -> String {
         let user = UnixUser::from_enviroment();
 
         let UnixUser {
@@ -85,10 +61,10 @@ impl OwnerValidationError {
                     - {}
                   {}
                 "#},
-                db_or_user.lowercased(),
-                name,
-                db_or_user.lowercased(),
-                db_or_user.lowercased(),
+                db_or_user.lowercased_noun(),
+                db_or_user.name(),
+                db_or_user.lowercased_noun(),
+                db_or_user.lowercased_noun(),
                 username,
                 groups
                     .into_iter()
@@ -99,8 +75,8 @@ impl OwnerValidationError {
             .to_owned(),
             OwnerValidationError::StringEmpty => format!(
                 "'{}' is not a valid {} name.",
-                name,
-                db_or_user.lowercased()
+                db_or_user.name(),
+                db_or_user.lowercased_noun()
             )
             .to_string(),
         }
diff --git a/src/core/types.rs b/src/core/types.rs
index 1c0354a..13ab86e 100644
--- a/src/core/types.rs
+++ b/src/core/types.rs
@@ -91,3 +91,33 @@ impl From<String> for MySQLDatabase {
         MySQLDatabase(s)
     }
 }
+
+/// This enum is used to differentiate between database and user operations.
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+pub enum DbOrUser {
+    Database(MySQLDatabase),
+    User(MySQLUser),
+}
+
+impl DbOrUser {
+    pub fn lowercased_noun(&self) -> &'static str {
+        match self {
+            DbOrUser::Database(_) => "database",
+            DbOrUser::User(_) => "user",
+        }
+    }
+
+    pub fn capitalized_noun(&self) -> &'static str {
+        match self {
+            DbOrUser::Database(_) => "Database",
+            DbOrUser::User(_) => "User",
+        }
+    }
+
+    pub fn name(&self) -> &str {
+        match self {
+            DbOrUser::Database(db) => db.as_str(),
+            DbOrUser::User(user) => user.as_str(),
+        }
+    }
+}