Add the logout callback to prevent exception.

[jackycute]

Hi @hcyuser,

Thanks for contribution. Can you explain what is this PR solving?

[hcyuser]

If we didn't add a callback in req.logout(callback), It would get Error: req#logout requires a callback function on the webpage when running node app.js and clicking Sign out on the webpage.

[jackycute]

Thanks for adding this. This is caused by https://stackoverflow.com/questions/72336177/error-reqlogout-requires-a-callback-function from https://github.com/jaredhanson/passport/issues/902#issuecomment-1133897569

[Yukaii]

closed in favor of #1837