The form builder in Customer Fields gives you full control over ALL of the fields that are included in a form. With this much control, it's important to note the following:

You can find the email and password fields in the 'Standard fields' section of the app's form builder: 

If you create a form without the email and password fields, then users can still submit the form and the form data will be saved into Shopify. However, unless the person submitting the form has already logged into an existing customer account before submitting the form, then the app will create a new customer record in Shopify, and this new customer record will not have an account. If the person is logged in to an account prior to submitting the form, then the app will update their existing customer record in Shopify once the form is submitted.

Since the Customer Fields app is primarily designed to save customer data in Shopify when someone submits a form, and Shopify requires certain fields when creating a customer record, each registration form you create in the app should have at least one of the following fields:

If someone tries to submit a form on the storefront without a value for at least one of the fields needed to save data to Shopify (listed above), and the person submitting is not already logged in to a customer account on the storefront, then they will see an error message like the following:

"Customer must have an email address, phone number or name"

To be clear, existing customers who have logged in to their account will not see this error when submitting the form - it's only users who have yet to register for an account (or have not logged in to their account) that will receive the error.

To avoid this potential error altogether when submitting forms, we suggest using at least one of the required fields (first_name, last_name, email, or phone), which will satisfy Shopify's minimum requirements for customer records.

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