RESTEASY003145: Unable to find a MessageBodyReader of content-type application/json and type class org.keycloak.representations.AccessTokenResponse

Question

I\'m trying to test Keycloak REST API. Instaled the version 2.1.0.Final. I can access the admin through browser with SSL without problems.

I\'m using the code above:

Answer 1

Or if you create client with proxy then better to initialize provider factory before:

    ResteasyProviderFactory instance=ResteasyProviderFactory.getInstance();
    RegisterBuiltin.register(instance);
    instance.registerProvider(ResteasyJackson2Provider.class);