Patching Callback Routes for Load and Uninstall

[VitaliJud]

All 3 routes were using the same callback url - /auth/install which was failing to load the app.

[matthewvolk]

Looks good, and thank you for the PR! Just one quick fix if you don't mind 😄

[matthewvolk]

Thank you @VitaliJud ! This all looks good, but do you mind removing this file from the PR? I want to make sure VSCode settings are added explicitly by the user instead of automatically.

[matthewvolk]

👋 Happened to realize something while revisiting this project. That authCallback param is only ever used in the bigrequest.oauth.authorize method (here), and never in the bigrequest.oauth.verify methods that are called on the load and uninstall routes (here)

In other words, this PR won't functionally change anything about how the app loads and uninstalls, but it does highlight that the requiring of that parameter is confusing if the bigrequest client is only being used for JWT verification.

Edit:
matthewvolk/bigrequest#518