Server side file reload causing problems

[futantan]

I'm using firebase-admin on server side, in getServerSideProps I called a function from db.js called fetchUsers, which looks like this:

var admin = require('firebase-admin')
const serviceAccount = {
  //...
}

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount),
})
console.log('executed====')

const db = admin.firestore()

const fetchUsers = (userId, db) => {
  return db
    .collection('users')
    .doc(userId)
    .get()
    .then((docRef) => {
        // ...
    })
}

But because of HMR, this file will be executed more than once, so admin.initializeApp will be called multiple times, which cause a problem

Is there anyway to prevent a server side file to reload in dev environment?