/// <summary>
/// Ifs the user has acces to chat.
/// </summary>
/// <param name="controller">The controller.</param>
/// <param name="client">The client.</param>
/// <param name="chatId">The chat identifier.</param>
/// <param name="userId">The user identifier.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
public static bool IfUserHasAccesToChat(this ApiController controller, ChatServiceClient client, int chatId, int userId)
{
return(client.GetAllUsersFromChat(chatId).ToList().Find(user => user.Id == userId) != null);
}