feat: Add Twilio Verification Service (#8678)

# Which Problems Are Solved
Twilio supports a robust, multi-channel verification service that
notably supports multi-region SMS sender numbers required for our use
case. Currently, Zitadel does much of the work of the Twilio Verify (eg.
localization, code generation, messaging) but doesn't support the pool
of sender numbers that Twilio Verify does.

# How the Problems Are Solved
To support this API, we need to be able to store the Twilio Service ID
and send that in a verification request where appropriate: phone number
verification and SMS 2FA code paths.

This PR does the following: 
- Adds the ability to use Twilio Verify of standard messaging through
Twilio
- Adds support for international numbers and more reliable verification
messages sent from multiple numbers
- Adds a new Twilio configuration option to support Twilio Verify in the
admin console
- Sends verification SMS messages through Twilio Verify
- Implements Twilio Verification Checks for codes generated through the
same

# Additional Changes

# Additional Context
- base was implemented by @zhirschtritt in
https://github.com/zitadel/zitadel/pull/8268 ❤️
- closes https://github.com/zitadel/zitadel/issues/8581

---------

Co-authored-by: Zachary Hirschtritt <zachary.hirschtritt@klaviyo.com>
Co-authored-by: Joey Biscoglia <joey.biscoglia@klaviyo.com>

internal/notification/channels/twilio/channel.go

@@ -1,7 +1,9 @@
 package twilio
 
 import (
-	"github.com/kevinburke/twilio-go"
+	newTwilio "github.com/twilio/twilio-go"
+	openapi "github.com/twilio/twilio-go/rest/api/v2010"
+	verify "github.com/twilio/twilio-go/rest/verify/v2"
 	"github.com/zitadel/logging"
 
 	"github.com/zitadel/zitadel/internal/notification/channels"
@@ -10,8 +12,7 @@ import (
 )
 
 func InitChannel(config Config) channels.NotificationChannel {
-	client := twilio.NewClient(config.SID, config.Token, nil)
-
+	client := newTwilio.NewRestClientWithParams(newTwilio.ClientParams{Username: config.SID, Password: config.Token})
 	logging.Debug("successfully initialized twilio sms channel")
 
 	return channels.HandleMessageFunc(func(message channels.Message) error {
@@ -19,11 +20,30 @@ func InitChannel(config Config) channels.NotificationChannel {
 		if !ok {
 			return zerrors.ThrowInternal(nil, "TWILI-s0pLc", "message is not SMS")
 		}
+		if config.VerifyServiceSID != "" {
+			params := &verify.CreateVerificationParams{}
+			params.SetTo(twilioMsg.RecipientPhoneNumber)
+			params.SetChannel("sms")
+
+			resp, err := client.VerifyV2.CreateVerification(config.VerifyServiceSID, params)
+			if err != nil {
+				return zerrors.ThrowInternal(err, "TWILI-0s9f2", "could not send verification")
+			}
+			logging.WithFields("sid", resp.Sid, "status", resp.Status).Debug("verification sent")
+
+			twilioMsg.VerificationID = resp.Sid
+			return nil
+		}
+
 		content, err := twilioMsg.GetContent()
 		if err != nil {
 			return err
 		}
-		m, err := client.Messages.SendMessage(twilioMsg.SenderPhoneNumber, twilioMsg.RecipientPhoneNumber, content, nil)
+		params := &openapi.CreateMessageParams{}
+		params.SetTo(twilioMsg.RecipientPhoneNumber)
+		params.SetFrom(twilioMsg.SenderPhoneNumber)
+		params.SetBody(content)
+		m, err := client.Api.CreateMessage(params)
 		if err != nil {
 			return zerrors.ThrowInternal(err, "TWILI-osk3S", "could not send message")
 		}

internal/notification/channels/twilio/config.go

@@ -1,11 +1,40 @@
 package twilio
 
+import (
+	newTwilio "github.com/twilio/twilio-go"
+	verify "github.com/twilio/twilio-go/rest/verify/v2"
+
+	"github.com/zitadel/zitadel/internal/zerrors"
+)
+
 type Config struct {
-	SID          string
-	Token        string
-	SenderNumber string
+	SID              string
+	Token            string
+	SenderNumber     string
+	VerifyServiceSID string
 }
 
 func (t *Config) IsValid() bool {
 	return t.SID != "" && t.Token != "" && t.SenderNumber != ""
 }
+
+func (t *Config) VerifyCode(verificationID, code string) error {
+	client := newTwilio.NewRestClientWithParams(newTwilio.ClientParams{Username: t.SID, Password: t.Token})
+	checkParams := &verify.CreateVerificationCheckParams{}
+	checkParams.SetVerificationSid(verificationID)
+	checkParams.SetCode(code)
+	resp, err := client.VerifyV2.CreateVerificationCheck(t.VerifyServiceSID, checkParams)
+	if err != nil || resp.Status == nil {
+		return zerrors.ThrowInvalidArgument(err, "TWILI-JK3ta", "Errors.User.Code.NotFound")
+	}
+	switch *resp.Status {
+	case "approved":
+		return nil
+	case "expired":
+		return zerrors.ThrowInvalidArgument(nil, "TWILI-SF3ba", "Errors.User.Code.Expired")
+	case "max_attempts_reached":
+		return zerrors.ThrowInvalidArgument(nil, "TWILI-Ok39a", "Errors.User.Code.NotFound")
+	default:
+		return zerrors.ThrowInvalidArgument(nil, "TWILI-Skwe4", "Errors.User.Code.Invalid")
+	}
+}