title: Do third-party logins work inside an iframe?
body: <p>I would like to build a simple web application and let partners embed it within their sites. I intend to let the partners embed it using an iframe, much like youtube:</p>
  
  <p><img src="https://i.stack.imgur.com/oZofM.png" alt="enter image description here"></p>
  
  <p>The app would require login via third-party authentication providers (e.g. Google, Facebook, OpenID). </p>
  
  <p>Will such an authentication method be a problem within the scope of an iframe?</p>