几行代码，
让你的应用开口说话

$ curl -X POST "$IM_API/$ORG/$APP/messages" \
  -H "Authorization: Bearer $APP_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "alice",
    "to_user": "bob",
    "type": "text",
    "body": { "text": "你好，Bob！" }
  }'

# 201 Created
{
  "message_id": "99582298747305984",
  "conversation_type": "single",
  "seq": 1,
  "sender": "alice",
  "recipient": "bob"
}