Where is the user's data stored in the DB?

Summary

I want to make a list of all users that have interacted with my bot, displaying their first name, last name etc.

Content

I want to make a list of all users that have interacted with my bot, displaying their first name, last name etc. I want to get this data from the database.

Info about the bot:

My bot asks the user a few questions. After answering the questions, a custom field/property is set to true for that user.

 

questionsend:
    component: "System.SetVariable"
    properties:
      variable: "questionsanswered"
      value: true
    transitions: {}
save:
    component: "System.CopyVariables"
    properties:
      from: "questionsanswered"
      to: "user.questionsanswered"
    transitions: 
      return: "save"