RFC 7662 token introspection
curl -X POST "https://your-instance/api/auth/oauth2/introspect" \ -H "Content-Type: application/x-www-form-urlencoded" \ -d 'token=string'{
"active": true,
"scope": "string",
"client_id": "string",
"exp": 0,
"sub": "string"
}{
"error": "string",
"error_description": "string"
}