We are going to design a REST API for performing CRUD operations on our todos model. Our application will have a basic authentication and authorization workflow in order to secure the REST API endpoints.

The following is the scaffolding for our application:

Here, we will have three individual packages called config, auth, and todo under the app module. We will configure and create the Flask application object in the app module's init file. The following is the code snippet of __init__.py, where we configured the Flask application object with extensions and the config object.

File—app/__init__.py:

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_jwt import JWT, jwt_required, current_identity

from app.config import config

db = SQLAlchemy()
migrate = Migrate()

def create_app(environment):
    app = Flask(__name__)
    app.config.from_object(config[environment])

    db.init_app(app)
    migrate.init_app(app...