implement credit card listing

uncloud_net/services.py

@@ -4,9 +4,24 @@ from .models    import *
 from .selectors import *
 from .tasks     import *
 
+
 @transaction.atomic
 def create_wireguard_vpn(owner, public_key, network_mask):
+    # Check if the user has a membership.
+    #------------------------------------
+    # If yes, user is eligible for API access and 2 VPNs
+    # If user already has 2 VPNs, we deduct from the credit
+    # If deduction is higher than the allowed credit, we fail
 
+
+    #
+    # Check if the user has suitable balance
+    # Create order
+    #
+    return create_wireguard_vpn_tech(owner, public_key, network_mask)
+
+@transaction.atomic
+def create_wireguard_vpn_tech(owner, public_key, network_mask):
     pool = get_suitable_pools(network_mask)[0]
     count = pool.wireguardvpn_set.count()