/// <summary>
 /// Gets push notifications connection string
 /// </summary>
 /// <param name="pushNotificationInstanceType">Push notification instance type</param>
 /// <returns>returns null</returns>
 public Task <string> GetPushNotificationsConnectionString(PushNotificationInstanceType pushNotificationInstanceType)
 {
     return(null);
 }
 /// <summary>
 /// Gets push notifications connection string
 /// </summary>
 /// <param name="pushNotificationInstanceType">Push notification instance type</param>
 /// <returns>service push notification string</returns>
 public async Task <string> GetPushNotificationsConnectionString(PushNotificationInstanceType pushNotificationInstanceType)
 {
     return(await this.settingsReader.ReadValueAsync("PushNotificationsConnectionString"));
 }