public IActionResult CreateMessage(string receiverId, string content, string threadId)
{
PrivateMessageViewModel message = new PrivateMessageViewModel();
message.Id = Guid.NewGuid().ToString();
message.From = _userService.GetCurrentUser(User.Identity.Name).Username;
message.Created = DateTime.Now;
message.receiverId = receiverId;
message.Content = content;
_messageService.CreatePrivateMessage(message);
return(RedirectToAction("ShowPosts", "Post", new { threadId }));
}