message: Name the variable what it is
diff: @@ -88,10 +88,10 @@ class CreateGroup extends Component {
  });
  }
  - handleAddMember = ({ member_id }) =>
  + handleAddMember = ({ member_id: user_id }) =>
  new Promise(resolve =>
  this.setState((prevState) => {
  - const user_ids = [...new Set(prevState.user_ids.concat([member_id]))];
  + const user_ids = [...new Set(prevState.user_ids.concat([user_id]))];
  return { user_ids };
  }, resolve));
  