title: How to secure database without authentication?
body: <p>I am creating an Unity game where I want to have global top 50 score list with usernames. I use Firebase realtime database. There is no need for user to authenticate. I am not that familiar with database security and pretty beginner with this concept. I am using Rest Api from Unity Asset store because it was pretty easy to send and get data from databse. </p>
  
  <p>How can I be sure that every score sent to database is from my app?</p>