user/id.go
func NextSystemUID() (int, error) {
	db, uid, err := nextUID(true)
	db.close()
	return uid, err
}
func NextSystemUID() (int, error) {
	db, uid, err := nextUID(true)
	db.close()
	return uid, err
}
func NextSystemUID ( ) ( int , error ) { db , uid , err := nextUID ( true ) db . close ( ) return uid , err }
// NextSystemUID returns the next free system user id to use.
NextSystemUID returns the next free system user id to use .