Change Facebook Login button

[Tomink]

Hi everyone, 

Does anyone know where I can update the facebook login button code? I would like to change it to "data-use-continue-as="true" so that the button will look like this: 

<div class="fb-login-button" data-max-rows="1" data-size="large" data-button-type="continue_with" data-show-faces="false" data-auto-logout-link="false" data-use-continue-as="true"></div>