fix filtering of deployments when adding slivers
diff --git a/planetstack/core/models/site.py b/planetstack/core/models/site.py
index b86b7c4..a97de3e 100644
--- a/planetstack/core/models/site.py
+++ b/planetstack/core/models/site.py
@@ -121,7 +121,7 @@
         ids = []
         for deployment in Deployment.objects.all():
             acl = deployment.get_acl()
-            if acl.test(user):
+            if acl.test(user) == "allow":
                 ids.append(deployment.id)
 
         return Deployment.objects.filter(id__in=ids)