Reference
ACCESS_NOT_FOUND
Channel access not found
Channel access not found
HTTP status 404 Not Found, code ACCESS_NOT_FOUND.
What it means#
No access row with that id exists on this channel, or it was already revoked.
What to do#
List the channel's access and use an id from the list.
On the wire#
Every error response carrying this code names this page in error.moreInfo,
with the request id in the query string. See Error codes for
the response shape and the list of every code.