private void createClient(string username) { mSinchClient = Sinch.SinchClientBuilder.context(ApplicationContext).userId(username).applicationKey(APP_KEY).applicationSecret(APP_SECRET).environmentHost(ENVIRONMENT).build(); mSinchClient.SupportCalling = true; mSinchClient.SupportManagedPush = true; mSinchClient.checkManifest(); mSinchClient.addSinchClientListener(new MySinchClientListener(this)); mSinchClient.CallClient.addCallClientListener(new SinchCallClientListener(this)); }