public ActionResult AcceptFriendRequest(string senderUsername, string recieverUsername)
{
var rep = new UserRepository(context);
var friendRep = new FriendshipRepository(context);
friendRep.AcceptFriendRequest(senderUsername, recieverUsername);
return(RedirectToAction("Friendship", new { username = recieverUsername, category = "Show all friends" }));
}