After logging in, the user's data is saved in the browser's memory. When localhost:4200 is launched in offline mode, data about the user/token, etc. are downloaded from the browser's memory. When you log out, the browser's memory is cleared.
Fill keycloakOptions
npm install -g http-server
ng build --configuration production
http-server -p 4200 -c-1 dist/keycloak-angular-pwa