mod_http_oauth2: Separate extracting credentials from requests and verifying The token endpoint also uses Basic auth, but the password would be the client_secret, so we need to verify against that instead of using test_password(). Splitting this up here avoids code duplication. Possibly this new function could go into util.http...

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labels:
- 'Stage-Obsolete'
summary: Message Carbons
superseded_by: mod_carbons
...

Since Prosody 0.10, this module is [included in Prosody](https://prosody.im/doc/modules/mod_carbons), you will be redirected there shortly.