code: def add_user(uid, password, desc=None):
      
      try:
          desc = uid if desc is None else desc
          user_object = {"description": desc, "password": password}
          acl_url = urljoin(_acl_url(), 'users/{}'.format(uid))
          r = http.put(acl_url, json=user_object)
          assert r.status_code == 201
      except DCOSHTTPException as e:
          # already exists
          if e.response.status_code != 409:
              raise
docs: Adds user to the DCOS Enterprise.  If not description
          is provided the uid will be used for the description.
  
          :param uid: user id
          :type uid: str
          :param password: password
          :type password: str
          :param desc: description of user
          :type desc: str