Step-by-step guide to building a Flask web app with secure OIDC login using Okta and the Authlib library. Covers setting up an Okta app integration, implementing the Authorization Code flow with PKCE, enabling self-service user registration, and using scoped OAuth 2.0 access tokens to call a protected backend API. Includes JWT validation on the resource server, custom scope enforcement, and full HTML/CSS for the frontend.
Table of contents
Build a Flask app with OIDC authenticationCreate an app integration in the Okta Admin ConsoleEnable self-service user registrationAdd secure user login to a Flask application with OktaCall a protected API with OAuth scoped tokensLearn more about OAuth and OIDC202 Impressions