title: Firebase anonymous login security
body: <p>I have a web app which writes data when a visitor submit a form and read data whenever that form is submitted. Everyone can read the data, but to write the data I use the firebase anonymous login option whenever the users click the submit button.</p>
  
  <p>In my firebase database rules I have set the write to "auth != null" because there is no users, but I still want to secure the data.</p>
  
  <p>Why can't anyone just find my config file in the browsers developer tools and create an app which uses that config file and anonymous login and abuse my data? And if they can, how do I ensure that my data stays secure?</p>