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Usage of /question/{id}/upvote/undo [POST] -
Stack Exchange API
https://stackoverflow.com/oauth/dialog?client_id=1&key=U4DMV*8nvpm3EOpvf69Rxw((&redirect_uri=https%3a%2f%2fapi.stackexchange.com%2fdocs%2foauth_landing
U4DMV*8nvpm3EOpvf69Rxw((
Usage of /question/{id}/upvote/undo POST
Discussion
Undoes an upvote on a question.
Use an access_token with write_access to undo an upvote.
To upvote a question use the /questions/{id}/upvote method.
This method returns the un-upvoted question.
Try It
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