addfirebase.example

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

test()

async function test() {
    let accessToken = ''

    const jwtClient = new google.auth.JWT(
        `aaa@aaaa.iam.gserviceaccount.com`,
        `aaaa.p12`,
        null,
        [`https://www.googleapis.com/auth/cloud-platform`]
    )

    jwtClient.authorize((err, token) => {
        accessToken = token.access_token;
        console.log(`access_token: ${accessToken}`)

        const axiosInstance = axios.create({
            headers: {
                'Authorization': `Bearer ${accessToken}`
            }
        })

        axiosInstance.post(
            `https://firebase.googleapis.com/v1beta1/projects/xxxx:addFirebase`,
            {
                timeZone: 'America/Los_Angeles',
                regionCode: 'US',
                locationId: 'us-central'
            }
        ).then(res => {
            console.log(res.data)
        }).catch(error => {
            console.log(error.response.data)
        })
    })
}