> ## Documentation Index
> Fetch the complete documentation index at: https://cometchat-013b37f0.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Login Listeners

The CometChat SDK provides you with real-time updates for the `login` and `logout` events. This can be achieved using the `LoginListener` class provided. LoginListener consists of 4 events that can be triggered. These are as follows:

| Callback Method                     | Information                                                                                                                                                      |
| ----------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| loginSuccess(User user)             | Informs you that the login was successful and provides you with a user object containing the data for the user that logged in                                    |
| loginFailure(CometChatException e)  | Informs you about the failure while logging in the user and provides you with the reason for the failure wrapped in an object of the `CometChatException` class  |
| logoutSuccess()                     | Informs you about the user being logged out successfully.                                                                                                        |
| logoutFailure(CometChatException e) | Informs you about the failure while logging out the user. The reason for the failure can be obtained from the object of the `CometChatException` class provided. |

To add the `LoginListener`, you need to use the `addLoginListener()` method provided by the SDK which takes a unique identifier for the listener and object of the `LoginListener` class itself.

We suggest adding the listener in the `init` method of the Stateful class or at the initialization of class where you wish to receive these events in.

<Tabs>
  <Tab title="Dart">
    ```dart theme={null}
    class Class_Name with LoginListener {
      
      // String loginListenerId = "UNIQUE_LISTENER_ID";
      // CometChat.addLoginListener(loginListenerId, Class_Name()); // add this in init
      @override
      void loginSuccess(User user) {
        debugPrint("LoginListener loginSuccess  $user");
      }
      
      @override
      void logoutFailure(CometChatException e) {
        debugPrint("logoutFailure ${e.message}");
      }
        
      @override
      void logoutSuccess() {
        debugPrint("LoginListener logout Success");
      }

      @override
      void loginFailure(CometChatException e) {
        debugPrint("LoginListener loginFailure  ${e.message}");
      }
    }
    ```
  </Tab>
</Tabs>

In order to stop receiving events related to login and logout you need to use the `removeLoginListener()` method provided by the SDK and pas the ID of the listener that needs to be removed.

<Tabs>
  <Tab title="Dart">
    ```dart theme={null}
    CometChat.removeLoginListener("UNIQUE_LISTENER_ID");
    ```
  </Tab>
</Tabs>