B2 account ID that owns the key.
One-time application key secret returned only at creation time.
B2 application key ID.
Legacy single bucket ID scope reported by B2, or null.
Bucket IDs scoped to this key, or null for unscoped keys.
Capabilities granted to the application key.
Expiration timestamp in milliseconds since epoch, or null for non-expiring keys.
Application key display name.
Optional object key prefix restriction, or null.
B2 key option flags.
Application key creation result including the one-time secret.