Certain permalink sctructures prevent the plugin from working correctly

When the permalink structure results in a trailing slash being added to the URL, the plugin doesn't correctly intercept requests. For example, if the structure is `/%postname%/'` and we try to access `wp-json/openid-connect/authorize`, WordPress will redirect to `wp-json/openid-connect/authorize/` and the plugin doesn't intercept the request. Setting the structure to `/%postname%` (without trailing slash) fixes the issue.

The plugin should be able to intercept requests independently of which permalink structure is set.

Start by tracing the plugin entry point that handles wp-json/openid-connect/authorize and how it matches requests after WordPress adds a trailing slash. Verify the behavior with both permalink structures shown in the issue; done means the plugin intercepts the authorization request in either URL form.

Written by the indexing model from the issue text.