[FR] Keychain support för Slack/Teams webhooks URL

[mikaellofgren]

Now that we can use Keychain for storing API username and password
wouldn't it make sense for
slack_webhook_url (JamfUploaderSlacker.py)
teams_webhook_url (JamfUploaderTeamsNotifier.py)
to have their webhook URLs stored in the Keychain as well?

Thanks!

[mikaellofgren]

And also for SMB if possible...