Serial Monitor Passcode

#include <Password.h>
#include <LiquidCrystal.h>

Password password = Password( "1234" );
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
byte currentLength = 0;

int led = 13;

void setup(){
  pinMode(led, OUTPUT);
  Serial.begin(9600);
  Serial.println("Try to guess the password!");
  Serial.println("Reset with ! evaluate with ?");
  Serial.print("Enter password: ");
  lcd.begin(16, 2);
  lcd.print("Enter Password");
}

void loop(){
  if (Serial.available()){
    char input = Serial.read();
    switch (input){
    case '!': //reset password
      password.reset();
      currentLength = 0;
      lcd.clear();
      // lcd.setCursor(16, 2);
      lcd.print("Password Reset");
      Serial.println("Password is reset!");
      break;
    case '?': //evaluate password
      if (password.evaluate()){
        lcd.clear();
        lcd.print("Correct");
        //LED Flash
        Serial.println("\tYou guessed the correct password!");
        digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
        delay(1000);               // wait for a second
        digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
        delay(1000);
        digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
        delay(1000);               // wait for a second
        digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
        delay(1000);
        digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
        delay(1000);               // wait for a second
        digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
        delay(1000);
        //Reset Password After Success
        password.reset();
        currentLength = 0;
        lcd.clear();
        delay(500);
        //Telling you it has been reset
        lcd.print("Password Reset");
        Serial.println("Password is reset!");
        delay(3000);
        lcd.clear();
        lcd.print("Enter Password");

      }
      else{
        lcd.clear();
        lcd.print("Incorrect");
        Serial.println("\tYou did not guess the correct password!");
        delay(3000);
        //Reset Password After Fail
        password.reset();
        currentLength = 0;
        lcd.clear();
        delay(500);
        //Telling you it has been reset
        lcd.print("Password Reset");
        Serial.println("Password is reset!");
        delay(5000);
        lcd.clear();
        lcd.print("Enter Password");
      }
      break;
    default: //append any keypress that is not a '!' nor a '?' to the currently guessed password.
      password << input;
      currentLength++;

      lcd.clear();
      lcd.print("Input: ");
      Serial.print("Enter password: ");
      for (byte i=0; i<currentLength; i++){
        lcd.print('*');
        Serial.print('*');
      }
    }
  }
}