OAuth 2.0 PKCE Authentication Workflow for WordPress

This workflow automates OAuth 2.0 authentication using the PKCE extension, suited for secure login integrations with identity providers like Keycloak. It facilitates seamless user login, token retrieval, and user info validation, then displays a personalized welcome page in WordPress. The process begins with a webhook trigger and involves steps such as cookie extraction, authorization code handling, token exchange, and user profile display. Practical for integrating secure user authentication in WordPress sites, especially when handling OAuth flows with external identity providers.