All of our themes feature a user icon that appears in the main navigation area of your site. If you are not seeing this icon on your store, it is likely because you have not enabled user accounts within your Shopify store settings. To check, please login to your Shopify dashboard, go to Settings and click the Checkout link. Make sure that customer accounts are either set to "Optional" or "Required."
Don't forget to save your settings. Once this is done, the user account will appear in your header.