How is the frontend header's «Sign In» link rendered?

Development Rendering

dmitrii_fediuk (Dmitrii Fediuk) March 10, 2016, 3:07am 2

See also:

How is the frontend header’s «Create an Account» link rendered?
How is the «My Wish List» link rendered in a customer’s dropdown menu in the Luma’s header?
How to modify the \Magento\Customer\Block\Account\AuthorizationLink::getLabel() method («Sign In» / «Sign Out» text)?