Some important commands in flask

pip install flask-restful
pip install marshmallow
pip install flask-apispec
pip install Flask-Cors
pip install bleach

# resources/user_resource.py

from flask_restful import Resource, fields, marshal_with
from flask import request
from extensions import db
from models.user import User


user_fields = {
    'id': fields.Integer,
    'username': fields.String,
    'email': fields.String,
    'first_name': fields.String,
    'middle_name': fields.String,
    'last_name': fields.String,
}

class UserResource(Resource):
    @marshal_with(user_fields)
    def get(self):
        users = User.query.all()
        return users

    @marshal_with(user_fields)
    def post(self):
        data = request.json
        email = data.get('email')
        first_name = data.get('first_name')
        middle_name = data.get('middle_name')
        last_name = data.get('last_name')
        new_user = User(email=email, first_name=first_name, middle_name=middle_name, last_name=last_name)
        db.session.add(new_user)
        db.session.commit()
        return new_user, 201