@Component 

public class AppAdminProvider implements AuthenticationProvider { 

  @Override 

  public Authentication authenticate(Authentication  

      authentication) throws AuthenticationException { 

    String name = authentication.getName(); 

    String password =  

      authentication.getCredentials().toString(); 

    if (name.equalsIgnoreCase("admin") &&  

        password.equalsIgnoreCase("admin")) { 

       Set<SimpleGrantedAuthority> authorities =  

new HashSet<>(); 

       authorities.add(new  

          SimpleGrantedAuthority("ROLE_ADMIN")); 

          return new      

            UsernamePasswordAuthenticationToken(name,  

          password, authorities); 

    } else { 

      throw new BadCredentialsException("Invalid Admin  

         User"); 

    } 

  } 

  @Override 

  public boolean supports(Class<?> authentication) { 

       return authentication.equals( 

          UsernamePasswordAuthenticationToken.class); 

  } 

}