title: Login with firebase + spring on backend
body: <p>This is my first web project so its also my first time doing a login, after a research the best guide I found is for firebase but the problem I have with it is that I need to have Users on my Spring database because I have relationship between entities that involves users
  Is still possible to use firebase having users on both sides, firebase and my own server database?</p>
  
  <p>I found another way to do login with spring security but I didnt find good guides to integrate it with react</p>