On your website, you only want to allow the customers who already registered as Shopify customers in your backend to request a quote.
To achieve this, please follow the steps below.
1. From the app admin page, click on Settings > General
2. Scroll down to Require login before add to quote > select Yes to enable the feature
3. Click Save to update the changes
If a customer who hasn’t log in customer account click to quote button, it directs him to the login page of you site immediately.
After he log into his customer account, it goes back to the product page and he can continues to request a quote.
If you do encounter any difficulty while proceeding these steps, don’t show any hesitation to contact us promptly via the email address email@example.com
We are always willing to help with all sincerity!