### Question:
UserApi { public void deleteUser(String username) throws ApiException { deleteUserWithHttpInfo(username); } UserApi();  UserApi(ApiClient apiClient); void createUser(User body); ApiResponse<Void> createUserWithHttpInfo(User body); void createUsersWithArrayInput(List<User> body); ApiResponse<Void> createUsersWithArrayInputWithHttpInfo(List<User> body); void createUsersWithListInput(List<User> body); ApiResponse<Void> createUsersWithListInputWithHttpInfo(List<User> body); void deleteUser(String username); ApiResponse<Void> deleteUserWithHttpInfo(String username); User getUserByName(String username); ApiResponse<User> getUserByNameWithHttpInfo(String username); String loginUser(String username, String password); ApiResponse<String> loginUserWithHttpInfo(String username, String password); void logoutUser(); ApiResponse<Void> logoutUserWithHttpInfo(); void updateUser(String username, User body); ApiResponse<Void> updateUserWithHttpInfo(String username, User body);  }### Answer:
@Test public void deleteUserTest() throws ApiException { String username = null; api.deleteUser(username); }