Notification preferences would be where you set how the user wants to receive notifications. For enablement services customers notifications are not sent to the users so you will need to set the notification type as NotificationType :NONE.

Fields

type : NotificationType
How the user prefers to receive notifications.

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email : String
The email to be used for notifications. Typically the same as the email used in the user object.

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phoneNumber:String!
The phone number to be used for notifications. Typically the same as the email used in the user object.