fix on customer auth, fix filters on shelves, refactor for article_nature, add slug

app/Models/Shop/ArticleNature.php

@@ -35,6 +35,11 @@ class ArticleNature extends Model implements HasMedia
         return $query->where($this->table.'.id', $id);
     }
 
+    public function scopeBySlug($query, $slug)
+    {
+        return $query->where($this->table.'.slug', $slug);
+    }
+
     public function scopeByBotanic($query)
     {
         return $query->ByProductType(1);