add pos device - fix closed quotas pagination

apps/pos_device/models.py

@@ -1,10 +1,17 @@
-from django.db import models
-from apps.core.models import BaseModel
 from apps.authentication.models import Organization
 from django.contrib.postgres.fields import ArrayField
+from apps.authorization.models import UserRelations
+from apps.core.models import BaseModel
+from django.db import models
 
 
 class ProviderCompany(BaseModel):
+    user_relation = models.ForeignKey(
+        UserRelations,
+        related_name='pos_provider',
+        on_delete=models.CASCADE,
+        null=True
+    )
     name_fa = models.CharField(max_length=250, null=True)
     name_en = models.CharField(max_length=250, null=True)
     activation = models.BooleanField(default=False)