@Before
 public void init() throws Exception {
   tokenServices.setClientDetailsService(
       new InMemoryClientDetailsServiceBuilder()
           .withClient("client")
           .authorizedGrantTypes("authorization_code")
           .scopes("read")
           .secret("secret")
           .and()
           .build());
   enhancer.setTokenEnhancers(Arrays.<TokenEnhancer>asList(jwtTokenEnhancer));
   jwtTokenEnhancer.afterPropertiesSet();
   tokenServices.setTokenStore(new JwtTokenStore(jwtTokenEnhancer));
   tokenServices.setTokenEnhancer(enhancer);
 }