Azure AD for authentication to be used to connect to PostgresDB
As of today Airflow uses credentials stored in KeyVault to connect to Postgres via PG bouncer service.
Customer has raised a concern regarding how Postgres DB is being used by Airflow. As recommended best practices, Azure AD for authentication to be used (see https://docs.microsoft.com/en-us/azure/postgresql/single-server/concepts-azure-ad-authentication and here https://docs.microsoft.com/en-us/azure/postgresql/single-server/how-to-configure-sign-in-azure-ad-authentication).