use deserializing properly

src/error.rs

@@ -176,6 +176,13 @@ pub enum PublicationDemographicError {
     InvalidValue,
 }
 
+#[derive(Error, Debug)]
+pub enum ParseLangErr {
+    #[error("found invalid lang")]
+    Invalid,
+}
+
+
 #[derive(Debug, Error, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct ApiError {