using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DemoProgram1HelloWorld {
  class Program {
    static void Main(string[] args) {

      string username;
      string password;
      bool loggedin = false;

      while(!loggedin) {
        Console.Write("Enter username: ");//asks for username and stores it to variable "username"
        username=Console.ReadLine();

        Console.Write("Enter password: ");//requests password
        password=Console.ReadLine();

        if(username=="Bioniclegenius"&&password=="blaarg") {
          Console.WriteLine("Login was successful!");
          loggedin=true;
        }
        else if(username!="Bioniclegenius") {
          Console.WriteLine("Invalid username.");
        }
        else {
          Console.WriteLine("Invalid password.");
        }
      }
    }
  }
}