Please help me to complete this code

Question

import java.security.MessageDigest;
import java.util.Map;
import java.util.Scanner;
public class PasswordService
   //The hash is to be formed using the SHA algorithm
   //to create a MessageDigest
   private final String algorithmName = "SHA";
   //Use a message digest to create hashed passwords
   private MessageDigest md = null;
   //We simulate a database of users using who have a login and password
   //as a key and value pair in a Map
   private Map<String, byte[]> userData;
   //complete the constructor
   public PasswordService()
     //TODO - intialize the class instance data
      //some dummy data - do not alter these lines
      addUser("daddy", "cool");
      addUser("nightflight", "topChat");
      addUser("boney", "2E5sxuSRg6A");
   public void showProvider()
      //TODO
   //Get the hash value for the provided string password.
     public byte[] getHash(String password)
      //TODO
      return null;
   public void addUser(String login, String password)
      //TODO
   public byte[] getPassword(String login)
      //TODO
      return null;
   public boolean checkLogin(String login, String password)
     // TODO
      return false;
   //This method is provided to perform a login from the command line
   public boolean doLogin()
      Scanner sc = new Scanner(System.in);
      System.out.println("Enter login please");
      String login = sc.next();
      System.out.println("Your password please");
      String password = sc.next();
      return checkLogin(login, password);
   public static void main(String[] args)
      int attempts = 0;
      showProvider();
      while(attempts < 4)
         boolean match = doLogin(); //request login and password
         System.out.println("match? " + match);
         attempts++;
}

Answer 1

please help me to complete this code
void completeCode(Code code,Properties options) throws CodeCompletingException
CodeCompleterFactory cf = CodeCompleterFactory.newInstance();
CodeCompleter cc = cf.newCodeCompleter();
cc.complete(code,options);
}