title: Firebase Admin SDK - Check user's password against variable on server
body: <p>I am trying to implement a feature for a user to change their password in their settings page when they are logged in, and I require the user's old password as well as the new password when they try to change it as an extra security measure. My problem is that I cannot find a way to verify if the user's old password is correct. Is there an easy way to do this?</p>
  
  <p>I receive the entered form inputs on the server so the solution would have to be on the backend (node.js)</p>
  
  <p>Many thanks</p>