code: protected UserApiKey fetchApiKeyInternal(final ObjectId id) {
      final StitchAuthRequest.Builder reqBuilder = new StitchAuthRequest.Builder();
      reqBuilder
              .withMethod(Method.GET)
              .withPath(routes.getApiKeyRouteForId(id.toHexString()))
              .withRefreshToken();
      return getRequestClient().doAuthenticatedRequest(
              reqBuilder.build(),
              new UserApiKeyDecoder()
      );
    }
docs: Fetches a user API key associated with the current user.
  
  @param id The id of the API key to be fetched.
  @return the API key.