Checking user login or not in MERN STACK, if user is already logged in (jwt token stored in cookie) then user can access the About Page else user will be navigated to Login Page .
"dependencies": {
"bcryptjs": "^2.4.3",
"cookie-parser": "^1.4.6",
"dotenv": "^16.0.3",
"express": "^4.18.2",
"jsonwebtoken": "^8.5.1",
"mongoose": "^6.7.3"
}