I am looking for help implementing authorization for the Bricklink API in R.
I have registered as a seller and obtained my keys and secrets. I have minimal
knowledge of OAuth but have previously successfully authorized with other APIs
(e.g. Spotify, Discogs, etc.) using the `httr` and `httr2` packages.
The authorization flow used by Bricklink confuses me and I am looking for help
correctly implementing it in my code. I'd prefer a solution using `httr2`
but any help is very welcome. I have also asked this question on StackOverflow
(https://stackoverflow.com/questions/75507874) but am hoping that I'll find
an answer in this community quicker.