Change Benefit Table Structure

app/Models/Plan.php

@@ -168,6 +168,15 @@ class Plan extends Model
 
     public function benefits()
     {
-        return $this->hasMany(Benefit::class, 'plan_code', 'id');
+        return $this->belongsToMany(Benefit::class, 'corporate_benefits', 'benefit_id', 'id')
+                    ->withTimestamps()
+                    ->withPivot([
+                        // TODO corporate_benefits pivot
+                    ]);
+    }
+    
+    public function corporateBeneftis()
+    {
+        return $this->hasMany(CorporateBenefit::class, 'benefit_id', 'id');
     }
 }