Can't cancel motherduck auth

[hadley]

If I run the following code:

library(duckdb)
con <- DBI::dbConnect(duckdb::duckdb())
dbExecute(con, "ATTACH 'md:'")

Then return to R, Ctrl + C won't cancel auth.

[krlmlr]

@hannes: How to reliably implement cancellation of all operations? Do we need to run all duckdb operations in another thread?