Progressive Web Apps with React

Updating an existing token

We'll do something similar with updating a token, but this time we need to access the existing token in the database.

Add a console.log here for testing purposes:

saveTokenToServer() {   this.messaging.getToken().then(res => {     if (this.tokensLoaded) {       const existingToken = this.findExistingToken(res);       if (existingToken) {         console.log(existingToken);       } else {         this.registerToken(res);       }     }   }); }

Then, try logging in and out of the app with different users. You should see the same existingToken key each time:

We can use this to grab the existing entry from the fcmToken table in our database, and update it:

saveTokenToServer() ...