Fix new user ID API rate limit and temp directory not being removed issue

[mikelei8291]

Fixes #82.
Fixes #73.

The file location of the proposed on-disk guest_token cache was set to a file in the temp directory on the system as it was rotated fairly often.

[mikelei8291]

Now also fixes #73.

[Ryu1845]

Thank you! Can I merge or do you want to add other things?

[mikelei8291]

That's all the things I've fixed, you can merge now. Thanks!

[mikelei8291]

Also I've tested these fixes on my end and they all worked fine.

[mikelei8291]

OK maybe one more thing. I've noticed this issue for a long time but didn't think it was worth fixing on its own so here you go.

[mikelei8291]

Now you can merge it if the CI passes.

[Ryu1845]

Beside the typo that looks good to me. I'll merge as soon as it's fixed.

[mikelei8291]

I fixed the typo. Shouldn't have happen.. I was thinking if it was correct but was too lazy to use a type checker...

[mikelei8291]

OK maybe one more thing. I've noticed this issue for a long time but didn't think it was worth fixing on its own so here you go.

Sorry I forgot to include the commit that I fixed the markdown rendering issue in README when I force pushed to fix the typo. Do you want me to add that commit back?

[Ryu1845]

I'll do it, don't worry