Have you read this part of the docs?
As far as I understand, it is found under “Settings” and is called “Create Access Token” on the Pushbullet Website.
Since the code is found under OH1 addons (although only available in the 2.2 snapshot) I guess that would be needed to set in a .cfg file.
I’m still on OH21.1, so I can’t say for sure!
don’t forget to sign the pull request (this is done within the comment of the pull request. Last line should be like Signed-off-by: Your Name your.email@provider.com - in doubt take a look at other pull requests.
When everything went right, you can delete the fork.
stable is not stable in the meaning of reliable but will not be changed anymore. unstable is not unstable in the meaning of unreliable but will get updates which maybe will break some configuration.
So, please don’t hesitate to use OH2.2.0, it’s way more stable (in the meaning of reliability) as OH2.1
But be aware that, if updating to a new build, some things may have changed, so before updating, read the changelog, best way is to make a backup for all user data and configurations. If openHAB does not work anymore after an update, you can roll back to the last version.