\"error_description\":\"Invalid client_id\"}")

[crspybits]

I returned to doing some testing with the ESS, and got the following when my test attempted to do a /token request to refresh the access token:

root@0b7d9b20cb90:~/Apps/ServerSolidAccount# swift test --enable-test-discovery --filter  ServerSolidAccountTests.GeneralTests/testDownloadExistingFile
[2/2] Merging module ServerSolidAccount
Test Suite 'Selected tests' started at 2021-09-24 00:30:29.626
Test Suite 'GeneralTests' started at 2021-09-24 00:30:29.644
Test Case 'GeneralTests.testDownloadExistingFile' started at 2021-09-24 00:30:29.644
Body: grant_type=refresh_token&refresh_token=VVwI1RtZGuQzSwqWeo2Srzwd1I80HMno&client_id=u2LAQ2cmfjsJAZOAgXP8MzKtmWopKAyx
request: Optional(https://broker.pod.inrupt.com/token)
request.allHTTPHeaderFields: Optional(["Authorization": "Basic dTJMQVEyY21manNKQVpPQWdYUDhNekt0bVdvcEtBeXg6NFJSSTU0b3JLQ2xzcjJMR2FEWnFqeEJ5MXFSWEZ3RjY=", "Dpop": "<snip>", "Content-Type": "application/x-www-form-urlencoded"])
String: Optional("{\"error\":\"invalid_client\",\"error_description\":\"Invalid client_id\"}")
<EXPR>:0: error: GeneralTests.testDownloadExistingFile : threw error "badStatusCode(401)"
Test Case 'GeneralTests.testDownloadExistingFile' failed (0.753 seconds)
Test Suite 'GeneralTests' failed at 2021-09-24 00:30:30.398
	 Executed 1 test, with 1 failure (1 unexpected) in 0.753 (0.753) seconds
Test Suite 'Selected tests' failed at 2021-09-24 00:30:30.398
	 Executed 1 test, with 1 failure (1 unexpected) in 0.753 (0.753) seconds

It looks like the registration for the client has expired.
Given that I'm trying to have a custom server that can run without the client having to re-register, I'm not sure what the fix is. Can the registration happen again on the server, without having to involve interaction with the user?

The last time I was doing these tests was on [2021-09-21T04:44:36.671Z]-- and at that time the /token request refresh was working fine.