Logout Route backend

[ayush25102001]

Feature description

Currently when the user logs in or signs up the token gets added to the tokens array but we do not have any logout route at the backend which removes the token from the array on logout. Thus I will create a logout route which will remove the token from the array and a logoutAll route that removes all token from the array(same as logout from all devices). I wish to work on the backend part of this ,Participant under Gssoc'22.

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