diff --git a/sdk/sdk.go b/sdk/sdk.go
index 944bb21e1..0a239d387 100644
--- a/sdk/sdk.go
+++ b/sdk/sdk.go
@@ -497,3 +497,7 @@ func (s *SDK) StoreKASKeys(url string, keys *policy.KasPublicKeySet) error {
 	}
 	return nil
 }
+
+func (s *SDK) TokenSource() auth.AccessTokenSource {
+	return s.tokenSource
+}