Function extractCredentials

extractCredentials(request: Request): Credentials
Extracts authentication credentials from an incoming HTTP request.

Reads two headers:
- Authorization: Bearer <token> → extracted as token
- apikey: <key> → extracted as apikey
This is a pure extraction step — no validation or verification is performed. Pass the result to verifyCredentials to validate against allowed auth modes.
Parameters
- request: Request
  The incoming HTTP request.
Returns Credentials
The extracted Credentials. Fields are null when the corresponding header is absent.
Example
```
import { extractCredentials } from '@supabase/server/core'

const creds = extractCredentials(request)
console.log(creds.token)  // "eyJhbGci..." or null
console.log(creds.apikey) // "sb-abc123-publishable-..." or null
```
- Defined in core/extract-credentials.ts:25