using System;
using System.Collections.Generic;

namespace CryptoFactoryLogin
{
    class Program
    {
        static void Main(string[] args)
        {
            // Simulate a user database
            Dictionary<string, string> users = new Dictionary<string, string>()
            {
                { "activationKey1", "user1" },
                { "activationKey2", "user2" },
                { "activationKey3", "user3" }
            };

            Console.WriteLine("CryptoFactory");
            Console.Write("Enter your activation key: ");
            string activationKey = Console.ReadLine();

            if (users.ContainsKey(activationKey))
            {
                Console.WriteLine($"Welcome, {users[activationKey]}!");
            }
            else
            {
                Console.WriteLine("Invalid activation key.");
            }

            Console.ReadKey();
        }
    }
}