IOS: I cant get this to work

[charlesmudy]

Hello,

I am a bit lost on how to get this to work. I followed the guide with the installation added:

The code below is placed inside a click function ... inside Cordova ready

cordova.plugins.firebase.auth.verifyPhoneNumber("mynumber").then(function(verificationId) {
    // pass verificationId to signInWithVerificationId
alert("Got here") // it never got here
}).catch(function(err) {
    console.error("phoner number verification failed", err);
});

It keeping saying firebase is not a function Not sure what I'm missing ...