### Question:
UserApi { public Mono<Void> createUsersWithListInput(List<User> body) throws WebClientResponseException { Object postBody = body; if (body == null) { throw new WebClientResponseException("Missing the required parameter 'body' when calling createUsersWithListInput", HttpStatus.BAD_REQUEST.value(), HttpStatus.BAD_REQUEST.getReasonPhrase(), null, null, null); } final Map<String, Object> pathParams = new HashMap<String, Object>(); final MultiValueMap<String, String> queryParams = new LinkedMultiValueMap<String, String>(); final HttpHeaders headerParams = new HttpHeaders(); final MultiValueMap<String, String> cookieParams = new LinkedMultiValueMap<String, String>(); final MultiValueMap<String, Object> formParams = new LinkedMultiValueMap<String, Object>(); final String[] localVarAccepts = { }; final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts); final String[] localVarContentTypes = { }; final MediaType localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes); String[] localVarAuthNames = new String[] { }; ParameterizedTypeReference<Void> localVarReturnType = new ParameterizedTypeReference<Void>() {}; return apiClient.invokeAPI("/user/createWithList", HttpMethod.POST, pathParams, queryParams, postBody, headerParams, cookieParams, formParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType); } UserApi(); @Autowired  UserApi(ApiClient apiClient); ApiClient getApiClient(); void setApiClient(ApiClient apiClient); Mono<Void> createUser(User body); Mono<Void> createUsersWithArrayInput(List<User> body); Mono<Void> createUsersWithListInput(List<User> body); Mono<Void> deleteUser(String username); Mono<User> getUserByName(String username); Mono<String> loginUser(String username, String password); Mono<Void> logoutUser(); Mono<Void> updateUser(String username, User body);  }### Answer:
@Test public void createUsersWithListInputTest() { List<User> user = null; api.createUsersWithListInput(user).block(); }