Show an example usage of isSupported()

TouchID.js

  clickHandler() {
    TouchID.isSupported()
      .then(biometryType => {
        // Success code
        if (biometryType === 'FaceID') {
          console.log('FaceID is supported.');
        } else if (biometryType === 'TouchID'){
          console.log('TouchID is supported.');
        } else if (biometryType === true) {
      	  // Touch ID is supported on Android
	}
      })
      .catch(error => {
        // Failure code if the user's device does not have touchID or faceID enabled
        console.log(error);
      });
    }