I have a client that uses Personify (which is .NET) as their CRM to manage their constituents, maintain memberships, etc. We're building out a Shopify store for their online bookstore, but they'd like to integrate their membership information from their main site, as well as membership info and sign-in (all managed through Personify) onto their ecommerce platform.
Has anyone been successful in doing such an integration? I'm not even sure where to start. Personify wants to pass a token via the URL and I'm not sure how to get shopify to invest that (or if shopify even can). We're willing to discuss a bespoke development as well.