You can check my medium blog to be more clear regarding this project.
- Navigate to face_reco_python directory and run
    python3 app.py- 
Please make sure you have ngrok installed if not download it from Officia Website 
- 
Once ngrok installed run the command in your terminal 
    ngrok http 5000
- 
Once done you will get a URL from ngrok. Copy that url. 
- 
Paste it in your main.dart file on line 108 
- 
and run your flutter project 
    flutter run

