Make the create_at and update_at fields optional

[Jakub Patočka]

Is there a possibility to create table without created_at and updated_at?
I don't want it in every table and also I would like to rename it and move at the end of the table. Currently these are the first columns in created table.

I extend BaseModel

@Model("users")
class UserModel extends BaseModel {
    //....
}