code: public GitlabUser createUser(CreateUserRequest request) throws IOException {
          String tailUrl = GitlabUser.USERS_URL + request.toQuery().toString();
          return dispatch().to(tailUrl, GitlabUser.class);
      }
docs: Create a new user. This may succeed only if the requester is an administrator.
  
  @param request An object that represents the parameters for the request.
  @return {@link GitlabUser}
  @throws IOException on gitlab api call error