tree ad1d196ae249168c719c961f94c3efb8afe07ddb
parent de56da50ca78ef275a95b4e59ce8d5e119eadd7a
author David Iglesias <ditman@gmail.com> 1578618751 -0800
committer GitHub <noreply@github.com> 1578618751 -0800
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[google_sign_in_web] Fix race condition on init. (#2455)

* [google_sign_in_web] Wait for Auth2 to be really ready.

The Auth object that `.init()` returns may not be fully ready by the time
we start calling methods on it; however it has a `.then()` method that
gets called when it is *really* ready to go.

* Add a completer to signal when Auth2 is ready.
* Throw StateError synchronously if .initialized is checked before calling .init()
* Move auth2-dependent init to the `then` method.
  * onSuccess, complete the auth2 ready future.
  * onError, throw a PlatformException. This is normally triggered when
the domain:port of the web app hasn't been whitelisted on the google
sign in console, and things like that. Useful for debugging.
* Update README with latest setup instructions.