[ ] I've added an entry to CHANGELOG.md if necessary.
Why
This encourages authToken to be set in a more secure location. Removing it from app.json in future versions makes sense, but will be a breaking change.
How
Just switched the warning to encourage users to switch.
Test Plan
Just try with env variables setup and nothing in the json file and it shouldn't show up, or alternately add variables to json file to get the warning.
Checklist
Why
This encourages authToken to be set in a more secure location. Removing it from app.json in future versions makes sense, but will be a breaking change.
How
Just switched the warning to encourage users to switch.
Test Plan
Just try with env variables setup and nothing in the json file and it shouldn't show up, or alternately add variables to json file to get the warning.