Kysely generated types

kysely-db.d.ts

// ./kysely-db.d.ts 

import type { ColumnType } from 'kysely';

export type Generated<T> = T extends ColumnType<infer S, infer I, infer U>
  ? ColumnType<S, I | undefined, U>
  : ColumnType<T, T | undefined, T>;

export interface Users {
  country: string | null;
  email: string;
  first_name: string;
  id: Generated<number>;
  last_name: string;
}

export interface DB {
  users: Users;
}