Improved error messages for auth methods
Improved error messages for auth methods

cesarmarinhorj/angularfire,FirebaseExtended/angularfire,douglascorrea/angularfire,bpietravalle/angularfire,itxd/angularfire,itxd/angularfire,bpietravalle/angularfire,bpietravalle/angularfire,denisKaranja/angularfire,FirebaseExtended/angularfire,denisKaranja/angularfire,fbentz/angularfire,FirebaseExtended/angularfire,jamestalmage/angularfire,douglascorrea/angularfire,fbentz/angularfire,fbentz/angularfire,nbr1ninrsan2/angularfire,jamestalmage/angularfire,yoda-yoda/angularfire,nbr1ninrsan2/angularfire,nbr1ninrsan2/angularfire,cesarmarinhorj/angularfire,yoda-yoda/angularfire,denisKaranja/angularfire,douglascorrea/angularfire,jamestalmage/angularfire,yoda-yoda/angularfire,itxd/angularfire,cesarmarinhorj/angularfire