Helper methods for mysqljs
// Example ; result.thenconsole.log.catchconsole.log // db.run(query: string): Promise// db.all(table: string): Promise// db.id(table: string, id: string): Promise// db.find(table: string, where: object): Promise// db.insert(table: string, set: object): Promise// db.update(table: string, set: object, where: object): Promise// db.delete(table: string, where: object): Promise