Attempt update to v4

auth/confirm.go

auth/fmt.go

auth/fmt_test.go

auth/interface.go

auth/params.go

auth/receivedConfirm.go

auth/receivedRequest.go

auth/request.go

auth/sentRequestHandler.go

auth/state.go

auth/state_test.go

auth/store/confirmation.go

auth/store/confirmation_test.go

auth/store/previousNegotiations.go

auth/store/previousNegotiations_test.go

auth/store/receivedRequest.go

auth/store/sentRequest.go

auth/store/store.go

auth/store/store_test.go

auth/utils_test.go