Approves a waiting request, so the program's next poll gets a token.

The token may create, list and delete the approver's own shares, less whatever of that the approver may not do themselves.

Errors

401 when not signed in, 403 when an API token was used or the account may not issue tokens, 404 when no request is waiting under that code or this instance has no accounts, 429 when this address has tried too many codes that do not exist.