Add credentials module to core list
diff --git a/planetstack/core/models/__init__.py b/planetstack/core/models/__init__.py
index 5a4798f..169817f 100644
--- a/planetstack/core/models/__init__.py
+++ b/planetstack/core/models/__init__.py
@@ -18,6 +18,7 @@
 from .serviceresource import ServiceResource
 from .slice import SliceRole
 from .slice import SlicePrivilege
+from .credential import UserCredential,SiteCredential,SliceCredential
 from .site import SiteRole
 from .site import SitePrivilege
 from .planetstack import PlanetStackRole