[keycloak-user] Bearer Only Application and refresh token

Hi, following some of your suggestions I designed an application composed of a: 1- frontend web application 2- backend REST API The frontend has a servlet-proxy to the backend REST API to avoid cross domain problems. The backend has a bearer-only configuration. Everything is working until the token does not expire, I tried to force refresh when I recieve 401 status but it does not work. What is supposed to be done every time the access tokes expires? -- Davide