logout method
Implementation
Future<V2TimCallback> logout() async {
if (!_isInitSDK) {
return V2TimCallback(code: TIMErrCode.ERR_SDK_NOT_INITIALIZED.value, desc: "sdk not init");
}
String userData = Tools.generateUserData('logout');
Completer<V2TimCallback> completer = Completer();
NativeLibraryManager.timCallback2Future(userData, completer);
Pointer<Void> pUserData = Tools.string2PointerVoid(userData);
NativeLibraryManager.bindings.DartLogout(pUserData);
return completer.future;
}