code: @GET
    @Path("{providerId}")
    public Response registerFederatedGetPath(
        @PathParam("providerId") String providerId,
        @QueryParam("providerUserId") String providerUserId,
        @QueryParam("access_token") String access_token,
        @QueryParam("secret") String secret,
        @QueryParam("expires_in") @DefaultValue("4601") Integer expiresIn,
        @QueryParam("appArg0") String appArg0
    ) throws IOException {
      return registerFederated(access_token, providerId, providerUserId,
          secret, expiresIn, appArg0);
    }
docs: Register federated using an access token obtained from a 3rd party service such as Facebook, Google etc.
  
  @param providerId     unique provider id
  @param providerUserId unique user id within the provider context
  @param access_token   access token
  @param secret         secret
  @param expiresIn      access token expiration
  @param appArg0        ?
  @return the userId associated with the Connection, null if new Connection