mockWebServer.enqueue(new MockResponse().setResponseCode(ERROR_CODE));
Mono<String> returnedMono = clientUnderTest.postWithAuthHeader(REQUEST_URL, TEST_JSON, USERNAME, PASSWORD);
mockWebServer.enqueue(new MockResponse().setResponseCode(ERROR_CODE));
Mono<String> returnedMono = clientUnderTest.postWithAuthHeader(REQUEST_URL, TEST_JSON, USERNAME, PASSWORD);