bicep/matrix: fix password provider

hosts/bicep/services/matrix/smtp-authenticator/smtp_auth_provider.py

@@ -10,6 +10,8 @@ class SMTPAuthProvider:
     def __init__(self, config: dict, api: module_api):
         self.api = api
 
+        self.config = config
+
         api.register_password_auth_provider_callbacks(
             auth_checkers={
                 ("m.login.password", ("password",)): self.check_pass,
@@ -26,13 +28,13 @@ class SMTPAuthProvider:
             return None
 
         result = False
-        with SMTP(config.smtp_host) as smtp:
+        with SMTP(self.config.smtp_host) as smtp:
             password = login_dict.get("password")
             try:
                 smtp.login(username, password)
+                result = True
             except:
                 return None
-            result = True
 
         if result == True:
             return (self.api.get_qualified_user_id(username), None)