import ( "github.com/boltdb/bolt" ) func main() { // Open BoltDB database db, err := bolt.Open("test.db", 0666, nil) if err != nil { log.Fatal(err) } defer db.Close() // Start a read-write transaction. err = db.Update(func(tx *bolt.Tx) error { // Create a bucket called "users" if it doesn't already exist. _, err := tx.CreateBucketIfNotExists([]byte("users")) if err != nil { return err } return nil }) if err != nil { log.Fatal(err) } }In the above example, we open a BoltDB database and start a read-write transaction. We then use the Tx.CreateBucketIfNotExists function to create a new bucket called "users" if it doesn't already exist. Finally, we commit the transaction. This function is used to ensure that a bucket exists before we perform any operations on it. By using this function, we avoid any potential errors that may occur if we try to access a bucket that doesn't exist.