Not obvious how to link to /-/github-auth-start if you limit to logged in users

[simonw]

I followed the "allow": "*" instructions in the README and ended up with a Datasette that just showed me the 403 page everywhere, but didn't provide a link to sign into the tool.

[eidorb]

Is the preferred approach to use the datasette-redirect-forbidden plugin, and configure it as follows?

"datasette-redirect-forbidden": {
    "redirect_to": "/-/github-auth-start",
}