How can I get the user id after login and pass it to an api route?

[thekoala]

Essentially what I am trying to do is pass the auth0 user ID to an API route in my application which calls a stripe endpoint which then creates a customer portal session. I need to pass the user ID to the api call but I am unable to call the useUser in an API route so I am unsure of how to proceed here.

const stripe = require('stripe')('some-api-key');

export default function create_customer_portal_session(req, res) {
    
    const  customerId = 'this should be the auth0 user id';
    const returnUrl = 'some-return-url';
    const portalSession = async () => await stripe.billingPortal.sessions.create({
        customer: customerId,
        return_url: returnUrl,
    });
    res.redirect(303, portalSession.url);
};

does anyone have an idea of how to do this?

[tyf]

Hey there @thekoala!

@thekoala

I need to pass the user ID to the api call but I am unable to call the useUser in an API route so I am unsure of how to proceed here.

Considering this is post login, perhaps you could inspect the access token (or id token) of the user and use the sub claim (Auth0 user_id) in the code above - For reference, here’s an example access token.

Hope this helps!

[thekoala]

I ended up figuring it out. All I had to do was create a form in one of my react components and pass the auth0 user id to it and since it was on the front end it had access to the useUser hook

<form method="POST" action="/api/create_customer_portal_session">
         <input type={'hidden'} name={'customerID'} value={customerID} onChange={() => {}}/>
         <button type="submit">Account Settings</button>
</form>

I had no idea I could pass a hidden value to an input. But, it worked out and everything is linked correctly now!

[tyf]

@thekoala Good stuff! Awesome to know you got working how you wanted and really appreciate you sharing with the community