title: Send OTP via email in Keycloak
body: <p>I want to use Keycloak to implement SSO but I noticed that there is no email OTP embedded in Keycloak. How do I sent OTP through email in Keycloak?</p>
  <p>I want the OTP to be provided not only via GoogleAuthenticator or FreeOTP app but also via email.</p>
  <p>Is it possible to do it with Keycloak?</p>