//Sign in Page
public bool SignInPage()
{
//loop until valid input or user choose 'back'
while (true)
{
// ask for username
Console.WriteLine("Please enter your Username:"******"Please enter your password: or enter \"Back\" to main menu");
string password = Console.ReadLine();
if (password.ToLower().Equals("back"))
{
return(false);
}
//check if the account exists
//if exist, the AccountMatch method would also save information of account to CurrentAccount Class
if (!BL.AccountMatch(username, password))
{
Console.WriteLine("Username or Passward doesn't match. Please try again.\n");
}
else
{
//after sign in,open or create json file for saving bank account information
if (new BankAccountBL().FetchInfo())
{
break;
}
}
}//end of loop
return(true);
}