🔤 S - Sessions 🎫

Sessions are used to store user data across multiple requests 🧠

In simple words 
A session helps the server 
remember the user after login 🔐

Without sessions ❌ 
• User must login again and again 
• No user state tracking 
• Poor user experience 

🧠 What Sessions Store
• User login status 👤 
• User ID 🆔 
• Preferences ⚙️ 
• Temporary data 📦 

🌍 Real World Examples
• Staying logged in after login 
• Keeping items in cart 
• Remembering user settings 
• Accessing private pages 

🔄 How Sessions Work
User logs in 👤 
Server creates a session 🎫 
Session ID is stored in cookie 🍪 
Server uses session ID to identify user 🔁 

💻 Example: Session in Express

const session = require("express-session");

app.use(
  session({
    secret: "mySecret",
    resave: false,
    saveUninitialized: true
  })
);

app.get("/login", (req, res) => {
  req.session.user = "Ravi";
  res.send("Logged in");
});