first setup of pos transaction - add provider, user, organization information of pos to login

apps/authentication/services/service.py

@@ -0,0 +1,17 @@
+import typing
+from apps.authentication.models import Organization
+
+
+def get_users_of_organization(org: Organization) -> typing.Any:
+    """ get users of an organizations """
+    user_relations = org.user_organization.all()
+
+    users_list = [{
+        'name': f"{rel.user.first_name} {rel.user.last_name}",
+        'national_code': rel.user.national_code,
+        'mobile': rel.user.mobile,
+        'phone': rel.user.phone,
+        'address': rel.user.address
+    } for rel in user_relations]
+
+    return users_list