Readonlymessage: stringError message from API (typically "Access token is missing or invalid")
Readonlystatus: 401HTTP status code (401)
Readonly_Readonly[Readonly[Readonly[Readonly[OptionalcauseError message from API (typically "Access token is missing or invalid")
OptionalstackReadonlystatusHTTP status code (401)
Represents a 401 Unauthorized error from Pennylane API. Occurs when the API key is missing or invalid.