public ViewResult Signup(User user)
        {
            bool IsError = false;

            if (ModelState.IsValid)
            {
                if (userDB.IsUsernameExist(user.Username))
                {
                    IsError = true;
                    ModelState.AddModelError("Username", "This Username already used by other user, try another one");
                }
                if (userDB.IsEmailExist(user.Email))
                {
                    IsError = true;
                    ModelState.AddModelError("Email", "This Email already used by other user, try another one");
                }
                if (user.Password != user.ConfirmPassword)
                {
                    IsError = true;
                    ModelState.AddModelError("ConfirmPassword", "Password does not match");
                }
                if (IsError)
                {
                    return(View());
                }
                else
                {
                    userDB.AddUserToDB(user.Username, user.Password, user.Email);
                    currentUser = userDB.GetUserFromDB(user.Username, user.Password);
                    List <Post> postList = postDB.GetAllPostsFromDB();
                    HttpContext.Response.Cookies.Append("Logined", "true");
                    return(View("Home", postList));
                }
            }
            else
            {
                return(View());
            }
        }