Ionic: facebook and google login, from respective native apps, with a Phonegap Build app

Hi @dayanajabif, thanks for both of your links.
I followed the tutorial for Facebook log in. But now when I run my app in android :

ionic run android -lcs

I get this error, as if the plugin was not here

13    249714   error    ReferenceError: facebookConnectPlugin is not defined
at k.$scope.facebookSignIn (http://192.168.0.11:8100/js/controllers.js:80:5)

Can you help please ?