EXPO_PUBLIC_REST_API_SERVER=your-ngrok-http-link-here EXPO_PUBLIC_GOOGLE_IOS_CLIENT_ID= EXPO_PUBLIC_GOOGLE_ANDROID_CLIENT_ID= EXPO_PUBLIC_FACEBOOK_IOS_CLIENT_ID= EXPO_PUBLIC_FACEBOOK_ANDROID_CLIENT_ID=
In another terminal inside /backend run python manage.py make migrations then python manage.py migrate and lastly python manage.py runserver
Happy Testing