Keycloak Setup, Installation, and General Implementation Guide This guide will walk you through the process of setting up Keycloak, installing it, and implementing it in an application with a React frontend and a Java Spring backend. Additionally, we will cover the setup of authorization including resources, scopes, policies, and permissions. Table of Contents 1.Introduction 2.Prerequisites 3.Keycloak Installation 4.Keycloak Configuration 1.Creating a Realm 2.Creating a Client 5.Integration with React Frontend 1.Setting Up Keycloak in React 2.Protecting Routes 6.Integration with Java Spring Backend 1.Setting Up Keycloak in Spring Boot 2.Protecting Endpoints 7.Authorization Setup 1.Resources 2.Scopes 3.Policies 4.Permissions 8.Testing and Debugging 9.Conclusion