Exercise 20: Usernames

import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        System.out.print("Type your username: ");
        String username = reader.nextLine();
        System.out.print("Type your password: ");
        String password = reader.nextLine();
        if (username.equals("alex")) {
            if(password.equals("mightyducks")){
                System.out.println("You are now logged into the system!");
            }
        } else if (username.equals("emily")) {
            if(password.equals("cat")){
                System.out.println("You are now logged into the system!");
            }
        } else {
            System.out.println("Your username or password was invalid!");
        }
    }
}