private static Response.Builder fakeResponse(int statusCode, String httpMessage) {
    Request fakeRequest = new Request.Builder().url("https://some/mock/url").build();
    return new Response.Builder()
        .request(fakeRequest)
        .protocol(HTTP_2)
        .code(statusCode)
        .message(httpMessage);
  }
regression coverage: all 401s were being incorrectly detected as invalid token.
extensions/data-transfer/portability-data-transfer-microsoft/src/test/java/org/datatransferproject/transfer/microsoft/MicrosoftApiResponseTest.java