| Code | Description |
| 0 — USER_LOGGEDIN_OK | Login successful, otherwise error code |
| 1 — USER_ALREADY_LOGGEDIN | Answer on CheckUserLoginStatus_Method, if current CID is already authorized at TransportRouter |
| 2 — NO_USER_LOGGEDIN | Answer on CheckUserLoginStatus_Method, if current CID is not authorized at TransportRouter — try to login |
| 3 — ACCESS_DENIED | Incorrect password or other problems with DB |
| 4 — SILENT_REJECT_LOGIN | Client shouldn’t show error to user (example: incorrect AutoLoginKey) |
| 5 — LICENSE_USER_LIMIT | License restriction of online users reached, server cannot login you |
| 6 — USER_DISABLED | User exists, but is disabled to use this server |
| 7 — RETRY_LOGIN | Client should retry to login after timeout (value in container or default), due to server busy or other server problems |
| 8 — INVALID_CLIENT_TYPE | User cannot login using this client app (try to use other type of client app) |
| 9 — SESSION_WAIT | User waits for an email with a link or code to confirm registration |
| USER_PASSWORD_EXPIRED = 65213 | User’s password expired |