@Autowired
    RibbonClientHttpRequestFactory requestFactory;
    @Bean
    RequestInterceptor oauth2FeignRequestInterceptor() {

        final OAuth2FeignRequestInterceptor oAuth2FeignRequestInterceptor = new OAuth2FeignRequestInterceptor(new DefaultOAuth2ClientContext(), resource());
        final ClientCredentialsAccessTokenProvider clientCredentialsAccessTokenProvider = new ClientCredentialsAccessTokenProvider();
        clientCredentialsAccessTokenProvider.setRequestFactory(requestFactory);
        oAuth2FeignRequestInterceptor.setAccessTokenProvider(clientCredentialsAccessTokenProvider);
        return oAuth2FeignRequestInterceptor;
    }

    private OAuth2ProtectedResourceDetails resource() {
        ClientCredentialsResourceDetails details = new ClientCredentialsResourceDetails();
        details.setAccessTokenUri(accessTokenUri);
        details.setClientId(clientId);
        details.setClientSecret(clientSecret);
        details.setScope(scope);
        return details;
    }