title: Passwordless Authentiacation with access token for Mobile
body: <p>I would like to create passwordless authentication using SMS.
  When user write his username he would get an sms with otp code.
  after user write the otp code he would get access token. 
  We are using native mobile apps.</p>
  
  <p>How can I achieve that?
  I read the docs on <a href="https://developers.onelogin.com/api-docs/1/multi-factor-authentication/overview#" rel="nofollow noreferrer">https://developers.onelogin.com/api-docs/1/multi-factor-authentication/overview#</a></p>
  
  <p>on step 7 'Grant access when verification returns success.' I am struggling to understand how can I create access/refresh token or Authorization code for the user.</p>