Creating stripe account for user


I am using the stripe plug in to handle all the payments for our website which has been fine.

The problem I am having is I would like to create an account on stripe and link it to the account user has created on our website. We need to do this to convert old gift cards to the new system by using “adjust a user’s credit balance” but this can only work for the user who has a stripe customer id.

I know I can do this via Stripe.js Customer - Create, but this doesn’t add the customer id to the default stripe plug-in’s field, which is hidden and uneditable.

Is there any way via the official stripe plug in to create a customer without charging them, or a way to have access to modify the Stripe’s customer id?

Thank you so much.