For anyone looking for the 3.0+ compatible API changes pending the guide update:
oktaSignIn.token.hasTokensInUrl
–>
oktaSignIn.hasTokensInUrl
oktaSignIn.token.parseTokensFromUrl
–>
oktaSignIn.authClient.token.parseFromUrl
oktaSignIn.session.get(function (res) {...
–>
oktaSignIn.authClient.session.get().then(function (res) {...