get iat from token code example

Example 1: jwt

JSON Web Token is an Internet standard for creating data with optional
signature and/or optional encryption whose payload holds JSON that asserts
some number of claims.

The tokens are signed either using a private secret or a public/private key.

Example 2: jsonwebtoken

jwt.sign({  exp: Math.floor(Date.now() / 1000) + (60 * 60),  data: 'foobar'}, 'secret');