feat(link_codes): linking method between telegram and website

db/models/__init__.py

@@ -1,5 +1,6 @@
 from .addons import Addon
 from .invoice import Invoice
+from .link_codes import LinkCode
 from .orders import Order, OrderAddon
 from .pricing import PricingConfig
 from .service_signatures import ServiceSignature
@@ -13,6 +14,7 @@ __all__ = [
     "Addon",
     "BalanceTransaction",
     "Invoice",
+    "LinkCode",
     "Order",
     "OrderAddon",
     "PricingConfig",