MongoDB migration to serverless Atlas/Realm and seeking advice on serverless functions and database migration.

exports.createAtlasUserWithEmail = async function(email) {

const realmApp = context.services.get('mongodb-atlas');

const usersCollection = realmApp.db('db-name.db').collection('User');

// Find the document with the specified email address

const user = await usersCollection.findOne({ username: email });

// Create an Atlas user using the email address

const atlasUser = await realmApp.emailPasswordAuth.registerUser({ email, password: 'testtest' });

Error creating Atlas user: ${error.message}

User not found with the specified email address: ${email}