Update authorizer_signature to use the right cmd name (#432)

Co-authored-by: Joseph Klix <[email protected]>

Author: ppadmavilasom

samples/utils/command_line_utils.py

@@ -135,7 +135,7 @@ def add_common_custom_authorizer_commands(self):
             "<str>",
             "The name of the custom authorizer to connect to (optional but required for everything but custom domains)")
         self.register_command(
-            self.m_cmd_custom_auth_username,
+            self.m_cmd_custom_auth_authorizer_signature,
             "<str>",
             "The signature to send when connecting through a custom authorizer (optional)")
         self.register_command(