@app.route('/add/rating', methods=['POST'])
def add_rating() -> str:
    """Add a new Rating to the database."""
    payload: dict = request.json
    _rating = payload.get('Rating')
    rating = Rating(
        venue_id=_rating.get('venue_id'),
        score=_rating.get('score'),
        review=_rating.get('review'),
    )
    db.session.add(rating)
    db.session.commit()
    return jsonify({'add_rating': 'success'})