Hi @Andrew_Scott,
Regarding the behavior.
Whether to specify the authentication method or not during the site creation command depends on gateway settings.
If for "Single Authentication Clients setting" the admin defines a specific authentication method, then you can not use the -a in the "trac create" command:
trac create -s "REDACTED" -di "REDACTED" -lo "Standard" -f "REDACTED_SIGNATURE"
But if the admin leaves the default value, then the authentication method parameter is required in the "trac create" command:
trac create -s "REDACTED" -di "REDACTED" -lo "Standard" -a "username-password" -f "REDACTED_SIGNATURE"
Since the Push Operation sends the full command, including the -a when choosing the "Standard" option, you need to make sure the gateway is configured to the default setting "Defined On User Record (Legacy)".
We are adding a clarification in the Harmony Endpoint EPMaaS Administration Guide.