curl --request POST \
  --url https://api.comm.com/api/v1/voice/numbers/sip \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "voice_account_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "number": 123,
  "sip_domain": "<string>",
  "sip_username": "<string>",
  "sip_password": "<string>",
  "sip_byoc_token": "<string>",
  "inbound_agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "disallowed_countries": [
    123
  ]
}'

{
  "data": {
    "id": "<string>",
    "number": 123,
    "voice_account_id": "<string>",
    "inbound_agent_id": "<string>",
    "sip_config": "<string>",
    "disallowed_countries": "<string>",
    "team_id": "<string>",
    "voice_provider": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}