It looks so simple. You click: Login And within seconds… 👉 You’re inside the app. Easy, right? Not really. Behind that one tiny button… There’s a surprising amount of engineering happening. Let’s break down what really happens 👇 💡 It Starts With a Form You enter: Email Password And click login. Simple user action. But under the hood… Things are just getting started. 📡 Step 1: A Request Is Sent Your app sends an API request to the server: ```http id="r4pj4o" POST /login Along with: * Credentials * Headers * Authentication data 👉 This is where frontend hands control to backend. --- ## 🔍 Step 2: Input Validation Before anything else… The server checks: * Is email valid? * Is password empty? * Any malicious input? Because security starts early. Not after login. --- ## 🔐 Step 3: Password Verification Here’s something important: Your actual password usually is **not stored directly**.…