diff --git a/flytekit/clients/auth/authenticator.py b/flytekit/clients/auth/authenticator.py
index 46a4db4127..11928fef27 100644
--- a/flytekit/clients/auth/authenticator.py
+++ b/flytekit/clients/auth/authenticator.py
@@ -126,7 +126,7 @@ def __init__(self, command: typing.List[str], header_key: str = None):
         self._cmd = command
         if not self._cmd:
             raise ValueError("Command cannot be empty for command authenticator")
-        super().__init__(header_key)
+        super().__init__(None, header_key)
 
     def refresh_credentials(self):
         """