How do I know who closed a migration request using the Github API?
eg. This stretch request was opened by myakura, closed by markdotto. But https://api.github.com/repos/twitter/bootstrap/pulls/4461 does not contain links to markdotto.
I would expect that the merged_by field will indicate the person who combined the stretch request (and therefore closed the request). But in the example you give, it is null .
merged_by
null