SpringSecurity Custom AuthenticationManager

CustomAuthenticationManager.java

package com.personal.banking.config;

import com.personal.banking.domain.Role;
import com.personal.banking.domain.User;
import com.personal.banking.repo.UserRepo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

public class CustomAuthenticationManager implements AuthenticationManager {

    @Autowired
    UserRepo userRepo;

    @Autowired
    PasswordEncoder passwordEncoder;

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        Optional<User> user = userRepo.findByUserName(authentication.getName());
        if (user.isPresent()) {
            if (passwordEncoder.matches(authentication.getCredentials().toString(), user.get().getPassword())) {
                List<GrantedAuthority> grantedAuthorityList = new ArrayList<>();
                for (Role role : user.get().getRoleSet()) {
                    grantedAuthorityList.add(new SimpleGrantedAuthority(role.getName()));
                }
                return new UsernamePasswordAuthenticationToken(authentication.getPrincipal(), authentication.getCredentials(), grantedAuthorityList);
            } else {
                throw new BadCredentialsException("Wrong Password");
            }
        } else {
            throw new BadCredentialsException("Wrong UserName");
        }
    }
}

CustomUserDetailService.java

thanks bro