> ## Documentation Index
> Fetch the complete documentation index at: https://www.cometchat.com/docs/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 of the the `LoginListener` class itself.

<Tabs>
  <Tab title="Java">
    ```java theme={null}
    CometChat.addLoginListener("UNIQUE_ID", new CometChat.LoginListener() {
      @Override
      public void loginSuccess(User user) {
          Log.d("LoginListener", "loginSuccess " + user.toString());
      }

      @Override
      public void loginFailure(CometChatException e) {
          Log.d("LoginListener", "loginFailure " + e.getMessage());
      }

      @Override
      public void logoutSuccess() {
          Log.d("LoginListener", "logoutSuccess ");
      }

      @Override
      public void logoutFailure(CometChatException e) {
          Log.d("LoginListener", "logoutFailure ");
      }
    });
    ```
  </Tab>

  <Tab title="Kotlin">
    ```kotlin theme={null}
    CometChat.addLoginListener("UNIQUE_ID", object : LoginListener() {
      override fun loginSuccess(user: User) {
          Log.d("LoginListener", "loginSuccess $user")
      }

      override fun loginFailure(e: CometChatException) {
          Log.d("LoginListener", "loginFailure " + e.message)
      }

      override fun logoutSuccess() {
          Log.d("LoginListener", "logoutSuccess ")
      }

      override fun logoutFailure(e: CometChatException) {
          Log.d("LoginListener", "logoutFailure ")
      }
    })
    ```
  </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="Java">
    ```java theme={null}
    CometChat.removeLoginListener("UNIQUE_ID");  
    ```
  </Tab>

  <Tab title="Kotlin">
    ```kotlin theme={null}
    CometChat.removeLoginListener("UNIQUE_ID")
    ```
  </Tab>
</Tabs>