This page can be accessed by going to System > Settings > Checkout
To improve security, Go to System → Settings → Checkout
To enhance security, you can require customers to create a unique login name instead of using their email address as login name. If set to ONthis setting is enabled, existing customers will be asked prompted to create choose a new login name at the during their first login after the setting is activated. If OFF, login name is set as customer email addressdisabled, their email address will continue to be used as their login name.