title: How to Login/register into Opencart using OTP (One time password)
body: <p>I am building an Android Application using opencart as my backend.</p>
  
  <p>I want login/registration to be otp based ( no password needed ever). I know how to send sms to user and verify phone number. I am also collecting user email and Name.</p>
  
  <p>I need to understand how can I register a user without password and then also make login work without password?</p>