Account User ID

Hello!
I am trying to create a new access to a lock, so i am using the endpoint /smartlock/{smartlockid}/auth.
This call has the body:

{
“name”: “string”,
“allowedFromDate”: “2024-02-27T10:01:40.667Z”,
“allowedUntilDate”: “2024-02-27T10:01:40.667Z”,
“allowedWeekDays”: 127,
“allowedFromTime”: 0,
“allowedUntilTime”: 0,
“accountUserId”: 0,
“remoteAllowed”: true,
“smartActionsEnabled”: true,
“type”: 0,
“code”: 0
}
How can i get the accountUserId?