The next store setting is
You can use the Customer Login options to manage access to your website. These options are commonly used by wholesale businesses that want to limit access to customers only.
Login Required to Checkout: Toggle the radio button
On to require your customers to log in to the online store before completing a transaction.
Login Required to View Store: Toggle the radio button
On to require your customers to log in before they are able to view your online store and products.
Customer Self-Registration: Toggle the radio button
On to require customers to create a customer profile before submitting an order.
Save to apply your changes.