insert_answer.js

  addAnswer(
      String questionID,
      String answerID,
    ) async {
      String addAnswer = """
      mutation addAnswer(\$questionID: uuid!, \$answerID: uuid!, \$userID: String!) {
        insert_user_answers(objects: {question_id: \$questionID, answer_id: \$answerID}) {
            affected_rows
        }
      }
      """;
      final MutationOptions options = MutationOptions(
        document: addAnswer,
        variables: <String, dynamic>{
          'questionID': questionID,
          'answerID': answerID,
          'userID': user.uid,
        },
      );
      final QueryResult result = await client.mutate(options);
      if (result.hasErrors) {
        print(result.errors);
      } else {}
    }