Agent having a conversation with an end-user.
URL to user's avatar/profile picture (displayed in Fin Messenger)
Example:"https://example.com/avatars/jane.jpg"
{ "id": "agent_123456", "user_type": "agent", "name": "Jane Doe", "email": "jane.doe@example.com", "photo_url": "https://example.com/avatars/jane.jpg", "alias_name": "Support Jane" }