public static async Task <MessageViewModel> GetForeignKeys(MessageViewModel obj)
 {
     if (obj.SenderId != null)
     {
         obj.Sender = await UserViewModel.SearchByID(obj.SenderId);
     }
     if (obj.RequestId != null)
     {
         obj.Request = await RequestViewModel.SearchByID(obj.RequestId);
     }
     return(obj);
 }