Lessons learned building scalable auth systems for real-world apps. My first time using Firebase was a little nerve-wrecking to say the least, it were as if the entire console was screaming in my face. Although intimidated I dove in head-first and realized I was afraid for nothing.
At first I was asking Gemini for EVERYTHING from how to set up a database to how to deploy my web-apps. But over time I started getting more familiar with it, although I may have forgotten how to set up admins more times than I'd like. I eventually learned that Firebase doesn’t have ‘roles’ built-in. You have to manage admin users either with custom claims or store roles in Firestore. That realization saved me a lot of repeated headaches.
This is how I first logged in a user
`import { initializeApp } from "firebase/app";
import { getAuth, signInWithEmailAndPassword } from "firebase/auth";
const firebaseConfig = {
apiKey: "YOUR_API_KEY",
authDomain: "your-app.firebaseapp.com",
projectId: "your-app",
storageBucket: "your-app.appspot.com",
messagingSenderId: "SENDER_ID",
appId: "APP_ID"
};
// Initialize Firebase
const app = initializeApp(firebaseConfig);
const auth = getAuth(app);
// Example login
signInWithEmailAndPassword(auth, "user@example.com", "password123")
.then(userCredential => {
console.log("Logged in:", userCredential.user);
})
.catch(error => {
console.error("Error:", error.message);
});`
Overall Firebase has made it very simple for me to navigate through it and understand the basics. Through this I realized that I created a mental block in my own head, a limit of some sorts up until I decided to throw myself off the deep-end, I sure am glad I did that. If you’re just starting with Firebase (or any new tool), don’t let fear hold you back. Dive in, break things, and you’ll learn faster than you think.
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