Ionic google login

Hi, I have built an app, that is working with a rest api I have in NodeJS. In the server, I have mysql databases, where there is a “Users” table, and then on other tables I save the user_id when the user performs a post.

Now, I’m trying to add google plus login to my app, and I have installed the google plus plugin, and I get all the user information when he does the login with this:

this.gp.login({}).then(res =>{
      this.informacionGoogle=res;
      this.isUserLoggedIn=true;
    }).catch(err=>console.log(err))

Now, I want to know how it would be possible to save the information in the database, as all the tutorials I’ve found are with firebase, and as there is no password, I don’t know if I have to save the user, get a token or something…
Thanks!!