📧 feat: Mailgun API Email Configuration (#7742)

* fix: add undefined password check in local user authentication

* fix: edge case - issue deleting user when no conversations in deleteUserController

* feat: Integrate Mailgun API for email sending functionality

* fix: undefined SESSION_EXPIRY handling and add tests

* fix: update import path for isEnabled utility in azureUtils.js to resolve circular dep.

api/models/userMethods.js

@@ -12,6 +12,10 @@ const comparePassword = async (user, candidatePassword) => {
     throw new Error('No user provided');
   }
 
+  if (!user.password) {
+    throw new Error('No password, likely an email first registered via Social/OIDC login');
+  }
+
   return new Promise((resolve, reject) => {
     bcrypt.compare(candidatePassword, user.password, (err, isMatch) => {
       if (err) {