💻 Tech
If you’re loading (i.e., using load function) a .js file that connects to a database, you might encounter this error: MongoServerError[AuthenticationFailed]: Authentication failed.. This is even after authenticating successfully with mongosh.
Try to use authSource in your connection string to specify which database MongoDB will look for user’s credentials. By default, when you spin up a new Docker container, the credentials are stored in the admin database that’s why in the query below, it’s the authSource value.
// query.js
const db = connect("mongodb://user:password@localhost:27017/somedb?authSource=admin")