### Observed behavior
When creating an owner-only client via the API Portal, the resulting access token is invalid. In addition to the error, these tokens are clearly not in JWT format. This also happens when resetting an access token via the API Portal. When doing the same operation via Meta, the token is a standard JWT and works correctly. This leads me to believe that this is an issue with the [OAuth extension /oauth2/client/{client_key}/reset_secret endpoint](https://github.com/wikimedia/mediawiki-extensions-OAuth/blob/master/src/Rest/Handler/ResetClientSecret.php). This is not an issue with client secrets, just with access tokens for owner-only clients.
```
$ curl -H "Authorization: Bearer 80_character_access_token" https://api.wikimedia.org/core/v1/wikipedia/en/page/Earth/bare
{"httpCode":401,"httpReason":"Jwt is not in the form of Header.Payload.Signature with two dots and 3 sections"}
```
### Expected behavior
Access tokens gotten through other means work as expected.
```
$ curl -H "Authorization: Bearer 1000_character_access_token" https://api.wikimedia.org/core/v1/wikipedia/en/page/Earth/bare
{"id":9228,"key":"Earth","title":"Earth","latest":{"id":989047607,"timestamp":"2020-11-16T19:26:33Z"},"content_model":"wikitext","license":{"url":"//creativecommons.org/licenses/by-sa/3.0/","title":"Creative Commons Attribution-Share Alike 3.0"},"html_url":"https://en.wikipedia.org/w/rest.php/v1/page/Earth/html"}
```