Remplace hard coded table name by config

[lbeauvisage]

if we use a "users" model (add table_name) different from \App\Models\User::class' the appliedByUser()` method failed with an SQL error:

Illuminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'users.id' in 'where clause' (SQL: select exists(select * from `competitors` inner join `promocode_competitor` on `competitors`.`id` = `promocode_competitor`.`user_id` where `promocode_competitor`.`promocode_id` = 1 and users.id = 6 and `competitors`.`deleted_at` is null) as `exists`) 

[ArtMin96]

Any news?