@Component
public class CustomAuthenticationProvider implements AuthenticationProvider {
private static final Logger logger = LoggerFactory.getLogger(CustomAuthenticationProvider.class);

@Override
public Authentication authenticate(Authentication auth) throws AuthenticationException {
    String userName = auth.getName().trim();
    String password = auth.getCredentials().toString().trim();
    String companyName ;


    if (userName.equals("admin") && password.equals("123456")) {
        List<GrantedAuthority> grantedAuths = new ArrayList<>();
        grantedAuths.add(new SimpleGrantedAuthority("ROLE_ADMIN"));
        Authentication upat = new UsernamePasswordAuthenticationToken(userName, password, grantedAuths);
        logger.info("{}:{}",userName,grantedAuths);
        return upat;

    } else {
        return null;
    }
}

@Override
public boolean supports(Class<?> auth) {
    return (UsernamePasswordAuthenticationToken.class.isAssignableFrom(auth));
}