Add mobile OTP authentication#80

This is just a feature suggestion with the app since you have 2-factor authentication.

Would you consider adding a OTP login feature (allow users to login with their mobile number) instead of the emails/ google authentication app. something like:
https://codecanyon.net/item/firemobile-wordpress-woocommerce-firebase-mobile-otp-authentication/28255096

Or getkeyy.com.

It would separate you from the current security plugin apps if implemented well.