Read: https://medium.com/keycloak/secure-vue-js-app-with-keycloak-94814181e344
Stolen from: https://github.com/akoserwal/keycloak-integrations/tree/master/vue-keycloak
AUTH_SERVER_URL=https://keycloak.example.com/auth
AUTH_REALM=example
AUTH_CLIENT_ID=client1