Update main.py

main.py

@@ -29,6 +29,7 @@ async def hello():
 @fast_app.get("/api/send")
 async def send_message():
     response_json = await client.send_message("@xpushz", "hello world!")
-    return {"success": response_json}
+    convert_str = str(response_json)
+    return {"success": convert_str}
 
 run_fast(build=fast_app, port=7860)