auth channels are implemented, no tests

api/authenticatedChannel.go

auth/callback.go

auth/confirm.go

auth/request.go

go.mod

go.sum

keyExchange/confirm_test.go

keyExchange/exchange_test.go

keyExchange/rekey_test.go

keyExchange/trigger_test.go

storage/auth/store.go

storage/e2e/store.go

storage/e2e/store_test.go