Currently, I am working on a NodeJS Express Application that connects to an Auth Server using client credentials grant. After receiving the token from the Auth Server, I use it to access data from an API.
I am seeking advice on the most effective way to store this token throughout my application. Any recommendations?
Just to clarify, the JWT is not linked to any specific user as my Express App itself is considered the Client in this scenario.
I plan on keeping this information stored in memory, with the intention of utilizing a singleton module for efficient management.
auth.js:
class Auth {
getToken() {
// Checking if token already exists and is not expired
if (this.token && !isExpired(this.token)) {
return Promise.resolve(this.token);
}
// If token does not exist or is expired, fetching new token from API
return asyncCallApiForToken();
}
}
module.exports = new Auth();
main.js
const auth = require('./auth.js)
auth.getToken()
.then(token => {
// Token successfully retrieved
}
In my opinion, it's best to refrain from storing the token long-term and instead only store it temporarily in memory. This is because the client credentials grant provides a simple way to obtain a new token without needing any input from the user.
However, if storing the token in-memory is not feasible, I would recommend treating the client credentials with the same level of sensitivity as the JWT token.
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