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livekit sip is not sending REGISTER when creating outbound trunk! whats the issue?

Thanks for reaching out, ZaidKaraymeh. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.


""" Hey there! Just a quick heads-up: LiveKit SIP outbound trunks don’t send REGISTER messages. Instead, they handle authentication on a per-call basis with each SIP INVITE request. This is totally normal and nothing to worry about. When you set up an outbound trunk, you’ll provide your SIP provider’s address along with your authentication details, like this: 
```{
  "trunk": {
    "name": "My outbound trunk",
    "address": "&lt;my-trunk&gt;.<http://pstn.twilio.com|pstn.twilio.com>",
    "numbers": ["+15105550100"],
    "auth_username": "&lt;username&gt;",
    "auth_password": "&lt;password&gt;"
  }
}```
 If your SIP provider needs REGISTER messages, you might want to: 
• See if they support per-call authentication for outbound calls
• Use a SIP proxy or gateway that can handle registration for LiveKit
 Feel free to reach out if you want me to help you with anything else! Sources: <https://github.com/livekit/protocol/blob/1d6123ccc90dc6dfeb58e7f630731672f4f9b79f/livekit/livekit_sip.pb.go#L4205-L4238|livekit/livekit_sip.pb.go> | <https://docs.livekit.io/sip/trunk-outbound/|SIP outbound trunk | LiveKit Docs>