If you haven’t yet launched your store, but want to let you visitors know that you’ll be opening soon, you can enable and customize your password page.
Activating the password page
To temporarily conceal your storefront from the public, go to Preferences in your Online store. In here you can Enable password.
Theme editor settings for password page
To access the password page settings, go to the theme editor (Customize) and select Password page from the page dropdown.
When this loads, a Password pages section should appear under Sections in the sidebar.
Gather customer emails
Customize the text that appears with the newsletter feature using the Newsletter text rich text field.