The Cabal file at https://github.com/yesodweb/authenticate/blob/master/authenticate/authenticate.cabal#L3 says `BSD3`, but the license file at https://github.com/yesodweb/authenticate/blob/master/authenticate/LICENSE contains a BSD2 license.
The Cabal file at https://github.com/yesodweb/authenticate/blob/master/authenticate/authenticate.cabal#L3 says
BSD3, but the license file at https://github.com/yesodweb/authenticate/blob/master/authenticate/LICENSE contains a BSD2 license.