How to add auth to apps created before 0.18.0?

[flybayer]

If I started my Blitz app before 0.18.0, I didn't have auth set up by default. How can I add auth to my app now?

[flybayer]

Hey, great question Brandon!

There's two main ways:

1. See diff
   • npm i -g blitz@latest
   • blitz new your-existing-app-name
   • Any totally new files will be created. And existing files with changes will show you a diff and ask whether you want to overwrite or not.
2. Generate and copy
   • npm i -g blitz@latest
   • blitz new newApp
   • Compare files between your existing app and this newApp. And manually copy over files from the new app to your app. Pay attention to differences in installed dependencies and blitz.config.js.

[thomasbroderick]

This would make a great addition to the official Docs under "Upgrading from earlier versions" or similar heading. I ended up doing something similar upgrading a few weeks back, but it'd be nice to have some official guidance.