References to wpe auth should be cleaned up

[bengreeley]

There are still some places in the repo where commands are using wpe apps <command> which has been deprecated and should be wpe <command>

Example: https://github.com/wpengine/headless-docs/tree/master/guides/getting-started/deploy-app/cli

[bengreeley]

Nevermind, I was misremembering the old command