NotificationSource.token could possibly be converted to a JSONField

[glennmatthews]

Environment

• Nautobot version: 1.1.5
• nautobot-circuit-maintenance version: 0.4.1

Proposed Functionality

The NotificationSource._token field is currently a BinaryField that stores a pickled representation of a GMail Credentials instance. This is a bit inelegant, as it prevents easy inspection of the stored credentials. It should be possible to change this to a JSONField and use the Credentials.to_json() and Credentials.from_authorized_user_info() APIs (reference) to read and write a cleaner JSON representation of the credentials instead.

Use Case

Ease of troubleshooting, ease of maintenance.