Flask API to handle Login and Registration.

LoginRegistrationAPI.py

from flask import Flask, jsonify, request, json
from flask_pymongo import PyMongo 
from bson.objectid import ObjectId 
from datetime import datetime 
from flask_bcrypt import Bcrypt 
# from flask_cors import CORS
# from flask_jwt_extended import JWTManager

app = Flask(__name__)

app.config['MONGO_DBNAME'] = 'demo'
app.config['MONGO_URI'] = 'mongodb://localhost:27017/demo'

mongo = PyMongo(app)
bcrypt = Bcrypt(app)


@app.route('/register', methods=["POST"])
def register():
    users = mongo.db.users
    first_name = request.get_json()['first_name']
    last_name = request.get_json()['last_name']
    username = request.get_json()['username']
    password = bcrypt.generate_password_hash(request.get_json()['password']).decode('utf-8')
    created = datetime.utcnow()

    inserted_id = users.insert_one({
        'first_name': first_name,
        'last_name': last_name,
        'username': username,
        'password': password,
        'created': created
    }).inserted_id

    new_user = users.find_one({'_id': ObjectId(inserted_id)})

    result = {'Username': new_user['username'] + ' registered'}

    return jsonify({'result': result})


@app.route('/login', methods=['POST'])
def login():
    users = mongo.db.users
    username = request.get_json()['username']
    password = request.get_json()['password']

    response = users.find_one({'username': username})

    if response:
        if bcrypt.check_password_hash(response['password'], password):
            result = jsonify({'status': 'logged in successfully'})
        else:
            result = jsonify({"error": "Invalid username and password"})
    else:
        result = jsonify({"result": "No results found"})
    return result


@app.route('/login', methods=['POST'])
def login():
    users = mongo.db.users
    username = request.get_json()['username']
    password = request.get_json()['password']

    response = users.find_one({'username': username})

    if response:
        if bcrypt.check_password_hash(response['password'], password):
            result = jsonify({'status': 'logged in successfully'})
        else:
            result = jsonify({"error": "Invalid username and password"})
    else:
        result = jsonify({"result": "No results found"})
    return result


if __name__ == '__main__':
    app.run(debug=True)