Step 2: Initialize Chat SDK

    // 1. Get the `SDKAppID` from the IM console.
    int sdkAppID = 0;
    // 2. Add the `V2TimSDKListener` event listener. `sdkListener` is the implementation class of `V2TimSDKListener`.
    V2TimSDKListener sdkListener = V2TimSDKListener(
      onConnectFailed: (int code, String error) {
        // Connection failure callback function
        // `code`: Error code
        // `error`: Error message
      },
      onConnectSuccess: () {
        // The SDK is successfully connected to the CVM instance
      },
      onConnecting: () {
        // The SDK is connecting to the CVM instance
      },
      onKickedOffline: () {
        // The current user is kicked offline: the SDK notifies the user on the UI, and the user can choose to call the login() function of V2TIMManager to log in again.
      },
      onSelfInfoUpdated: (V2TimUserFullInfo info) {
        // The profile of the current user was updated
        // `info`: information of the login user
      },
      onUserSigExpired: () {
        // The ticket expires when the user is online: the user needs to generate a new userSig and call the login() function of V2TIMManager to log in again.
      },
      onUserStatusChanged: (List<V2TimUserStatus> userStatusList) {
        // User status change notification
        // `userStatusList`: list of users whose status changes
        // Notification receiving: This callback will be triggered if a subscribed user status (including online status and custom status) changes.
        // This callback will be triggered when a friend's status changes after notifications of friends' statuses are enabled in the IM console, even if the status has not been subscribed to.
        // This callback will be sent to all the devices when an account is logged in on them and the custom status is changed on one of them.
      },
    );
    // 3. Initialize the SDK
    V2TimValueCallback<bool> initSDKRes =
        await TencentImSDKPlugin.v2TIMManager.initSDK(
      sdkAppID: sdkAppID, // SDKAppID
      loglevel: LogLevelEnum.V2TIM_LOG_ALL, // Log registration level
      listener: sdkListener, // Event listener
    );
    if (initSDKRes.code == 0) {
      // Initialized successfully
    }


// Uninitialize the SDK
TencentImSDKPlugin.v2TIMManager.unInitSDK();