Using Token Auth in Ably Flutter

This is a basic flutter app which shows how to use Token Authentication for Ably.

Warning:

• On iOS, secure transport is disabled to allow using a local http server to perform authentication. You can remove this by deleting the NSAppTransportSecurity dictionary in ios/Info.plist
• On Android, android:usesCleartextTraffic="true" is set AndroidManifest.xml.
• To connect to a local server on your machine from an Android device, use adb reverse tcp:8000 tcp:8000.