Please:

• Go into the Admin UI
• Select Tenants
• Select Edit for the Tenant you want to change
• Select the Advanced tab
• Scroll down to the External identifier generation section
• Find Email verification
• Choose Digits

There are other settings that may work for you as well depending on what you are trying to do. Please test it out and let me know if this works for you. Please keep in mind, you will be reducing the randomness and in turn the security of such identifiers.

As for your first question, I don't think you can change the values to only send numerical codes, but I will look into a bit deeper. I will let you know if I find otherwise or anyone feel free to jump in if you know.

For the second question, have you looked at Lambdas? You should be able to add the user.verified value to the JWT.

It would look something like this.

function populate(jwt, user, registration) {
  // Add a new claim named 'user_verified' from a data attribute on the user
  jwt.user_verified = user.verified;
}

If you need more help on how to create a Lambda, just let me know.