Create Conference
POST /v1/voice/conference
{
"name": "team-standup",
"participants": [
"+1234567890",
"+0987654321"
],
"moderator": "+1111111111",
"record": true
}Add Participant
POST /v1/voice/conference/{conference_id}/participants
{
"phone": "+2222222222",
"muted": false
}