Since I upgraded to messari-cli 0.1.52, it no longer throws an error when I haven't authenticated.
Instead it says in the terminal the deployment was successful.
Using the graph-cli, it would usually throw an error like so:
UNCAUGHT EXCEPTION: Error: Failed to deploy to Graph node https://api.thegraph.com/deploy/: auth failure::Invalid account name or access token
I'm on graph cli - 0.49