I am using Firebase's GoogleAuthProvider in my Vue 2 app to login user. I added the calendar to the provider's scope the get access to the user's calendar. I then use the access_token given in the result to retrieve the events. The problem is the accessToken expires after one hour. How can I renew it?

Here is my code to handle the login:

const auth = getAuth();
const provider = new GoogleAuthProvider();
provider.addScope("https://www.googleapis.com/auth/calendar");
const result = await signInWithPopup(auth, provider);
const credential = GoogleAuthProvider.credentialFromResult(result);
const token = credential.accessToken;
const user = result.user;
await this.checkUser(user, token);