Database URL not set in the Firebase config

You can find it in one of the following ways:

You can find your Realtime Database URL in the Realtime Database section of the Firebase console . Depending on the location of the database, the database URL will be in one of the following forms: https:// DATABASE_NAME . firebaseio.com (for databases in us-central1 )

When you create you Firebase database, it will be created with a unique URL ending in firebaseio.com. The URL of the database follows the format: https://<PROJECT_ID>.firebaseio.com/ What you want to do is go to the Database tab, switch from Cloud Firestore (Beta) to Realtime Database using the select button.28 Kas 2016