Create GCP Access token for Service Accounts

gcp_create_access_token.js

const {google} = require('googleapis');

const main = async function() {
    
    const auth = new google.auth.GoogleAuth({
        keyFile: __dirname  + '/service-account-key.json',
        scopes: [ 'https://www.googleapis.com/auth/cloud-platform']
    });

    const accessToken = await auth.getAccessToken()
    
    console.log(JSON.stringify(auth, null, 4))
    console.log(JSON.stringify(accessToken, null, 4))
}

main().then().catch(err => console.log(err))