User metadata of the request.
| JSON representation | 
|---|
| { "timeZone": string, "preferredLanguageCode": string } | 
| Fields | |
|---|---|
| timeZone | 
 Optional. IANA time zone, e.g. Europe/Budapest. | 
| preferredLanguageCode | 
 Optional. Preferred language to be used for answering if language detection fails. Also used as the language of error messages created by actions, regardless of language detection results. |