You’ll typically need to customize your store’s theme to add a customer login icon to your Shopify store. create customer accounts, and customer login to track orders, view order history, and save addresses for faster checkout. Here are the step-by-step instructions to add a customer login icon:
Login to your Shopify store’s admin dashboard
From your Shopify admin, go to settings
Click on the customer accounts
Edit Accounts in the online store and checkout
Select the Show login link in the header of the online store and at checkout
Now Choose which version of customer accounts to use from new customer accounts and classic customer accounts.
In the new customer accounts Customers will log in with a one-time code sent to their email. and classic customer account users will log in with email and password. B2B customers aren’t supported and will need to log in at the new customers’ account URL instead.
after selecting customer accounts save your change and now visit your store.