add enable cross origin

#!/usr/bin/env python3

from flask import Blueprint, jsonify, request

from flask_jwt_extended import JWTManager, create_access_token, create_refresh_token, get_jwt_identity, jwt_required

from flask_cors import cross_origin

# create blueprint backoffice_routes

access_routes = Blueprint("acces_routes", __name__)

@access_routes.route("/login", methods=["POST"])

@cross_origin()

def login():

    username = request.form.get("username", None)

    password = request.form.get("password", None)

    return jsonify(access_token=access_token, refresh_token=refresh_token)

@access_routes.route('/refresh', methods=["POST"])

@cross_origin()

@jwt_required

def refresh():

    current_user = get_jwt_identity()