// Logs in the user using the given BankLedger by prompting for their username
// and password until a successful match is found (or the user decides to exit).
private static void LogIn(Services.BankLedger ledger)
{
// initial prompt to log in
Console.WriteLine();
Console.WriteLine($"Enter your username (or \"{EXIT_KEYWORD}\" to return to the main menu):");
var username = Console.ReadLine();
if (!username.Equals(EXIT_KEYWORD, StringComparison.OrdinalIgnoreCase))
{
Console.WriteLine("Enter your password:"******"Invalid username/password combination, or account does not exist. Please try again.");
Console.WriteLine($"If you need to create an account, type \"{EXIT_KEYWORD}\" to return to the main menu.");
Console.WriteLine();
Console.WriteLine("Enter your username:"******"Enter your password:"******"Returning to main menu...");
Console.WriteLine();
}
}
public void TestLogIn_NoAccount()
{
Assert.IsFalse(ledger.LogIn("testUsername", "testPassword"));
Assert.IsNull(ledger.GetCurrentUser());
Assert.IsFalse(ledger.IsLoggedIn());
}