add NetworkSlice to model imports
diff --git a/planetstack/core/models/__init__.py b/planetstack/core/models/__init__.py
index 47ee943..9b19821 100644
--- a/planetstack/core/models/__init__.py
+++ b/planetstack/core/models/__init__.py
@@ -16,4 +16,4 @@
 from .sliver import Sliver
 from .reservation import ReservedResource
 from .reservation import Reservation
-from .network import Network, NetworkParameterType, NetworkParameter, NetworkSliver, NetworkTemplate, Router
+from .network import Network, NetworkParameterType, NetworkParameter, NetworkSliver, NetworkTemplate, Router, NetworkSlice