# Auth

The web is using OAuth 2.0 to handle auth. We host our own instance of [Curity](https://curity.io), which is our identity and access management solution.

## Session management in Next

We use [Auth.js](https://authjs.dev) to handle everything regarding auth in the web. We use the JWT session strategy, which means that everything regarding the session is stored in a JWT, which is stored in the browser in an encrypted cookie.

## Keeping the access token alive

When the user performs a navigation the web app often does multiple requests to Next. If the access token has expired Next will do a request to Curity to renew the tokens. Since we only allow a single refresh token to be used only once only the first request will succeed and the following requests will fail.

To avoid that we have a component whose only purpose is to keep the access token alive. As long as no other request is happening at the same time this will work fine.

To avoid a session that keeps on refreshing forever, if the user have the page open in the background e.g., we have a timeout that stops the refreshing if the user is not active.