public static string SimulateUserCreation()
        {
            Console.WriteLine("Let's first test the password hash creation, i.e. user creation...");
            Console.WriteLine("Please enter user ID: ");
            string userid = Console.ReadLine();

            Console.WriteLine("Please enter password: ");
            string password = Console.ReadLine();

            string salt = null;

            string passwordHash = pwdManager.GeneratePasswordHash(password, out salt);

            // Let's save the values in the database
            User user = new User
            {
                UserId = userid,
                PasswordHash = passwordHash,
                Salt = salt
            };

            // Let's add the user to the database
            userRepo.AddUser(user);

            return salt;
        }
 // Function to add the user in the dummy DB in memory
 public void AddUser(User user)
 {
     users.Add(user);
 }