oauth crud endpoint personal backend `token_id`

[emphasize]

This is a bit confusing:

token_id is historically a combination of the strings below

f"{device_uuid}|{oauth_client_id}:{oauth_app_id}"

to identify an oauth app in the database

the backend client expects token_id (# and below) preformatted as argument.
Don't require the caller to preformat and therefor poll the device uuid

If on the other hand only {oauth_client_id}:{oauth_app_id} (=oauth_id dubbed here) is expected, personal-backend # is missing to format the complete id.