Signing out fails to end Auth0 session

[reefdog]

Describe the bug
When you "sign out" from Streetmix, it does end your session at Streetmix. But it doesn't fully log you out from Auth0, which could be considered intended, except we throw this console error: XHR DELETE https://streetmix.net/api/v1/users/justin-1234/login-token [HTTP/2 400 Bad Request 96ms]

To Reproduce
Steps to reproduce the behavior:

1. Got to streetmix.net
2. Sign in (any method, but I tried Google and email)
3. Make sure the console is open and preserving logs
4. Sign out… which works, but…
5. ❌ See console for the above error
6. Try to sign in again using the same method as in №2 above
7. What will likely happen is Auth0 signs you in straight away, since your token is still good there.

Again, arguably staying logged-in to Auth0 is by design, but the attempt at deleting the login token suggests otherwise.

Expected behavior
Signing out at Streetmix signs you out from your Auth0 auth as well, or, we otherwise resolve the console error.

Screenshots

Desktop (please complete the following information):

• OS: macOS 11.3.1
• Browser: Firefox 88.0.1