Reactjs_Firebase_Register_Login Make sure you add your firebase api in firebase.js file. Check out your firebase backend. Try it yourself https://auth-lw.web.app/ Step1: Initialize Firebase Authentication Step2:Initialize Firebase Database as Backend Step3:Frontend Home View Step4:Frontend Signup View Step5:Frontend Login View Step6:Frontend Reset Passwd View Step7:Prepare for Signup (DisplayName:6vvvvvv Email:liuwgz@gmail.com) Step8:Successfully Signup/Login with Email/Login with Google/Login with Github and Redirect Step9:Prepare for Login with Email (Email:liuwgz@gmail.com) Step10:Prepare for Login with Google Step11:Backend Log in Firebase Authentication Step12:Backend Log in Firebase Database