Add the logout callback to prevent exception.

[hcyuser]

No description provided.

[hcyuser]

add callback for logout

[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 jaredhanson/passport#902 (comment)

[Yukaii]

closed in favor of #1837