public IActionResult AddFriend(PlayerFriendship playerFriendship)
        {
            try {
                Friendship friendship = new Friendship();

                friendship.PlayerID = playerFriendship.PlayerID;
                friendship.FriendID = playerFriendship.FriendID;

                Players.AddFriendship(friendship);
                return(Ok(Players.FindOneByID(playerFriendship.PlayerID)));
            } catch (Exception error) {
                return(StatusCode(500));
            }
        }