1. Provide a key pair * Generate a private/public key pair at the locations defined in your .env file, using the value of the OAUTH_PASSPHRASE as passphrase: https://oauth2.thephpleague.com/installation/#generating-public-and-private-keys 2. Update the database schema * Update your database schema so that bundle entities can be managed by Doctrine 3. Read the docs * Read the documentation at https://github.com/thephpleague/oauth2-server-bundle/blob/master/docs/index.md