code: def get_user(self, id=None, name=None, email=None):
          
          log.info("Picking user: %s (%s) (%s)" % (name, email, id))
          from qubell.api.private.user import User
          if email:
              user = User.get(self._router, organization=self, email=email)
          else:
              user = self.users[id or name]
          return user
docs: Get user object by email or id.