title: Logging-in from iframe in Chrome incognito mode
body: <p>I need to fix a problem which appeared after Chrome v80 which introduced a default option for Cookies of: <code>Block 3rd Party cookies in Incognito mode</code>.</p>
  <p>Use case:</p>
  <ul>
  <li>site A (<a href="https://siteA.com" rel="nofollow noreferrer">https://siteA.com</a>)</li>
  <li>site B (<a href="https://siteB.com" rel="nofollow noreferrer">https://siteB.com</a>)</li>
  <li>Site A includes an iframe of Site B, which require logging in</li>
  </ul>
  <p><strong>Problem:</strong>
  No session cookie is stored so session could not be started.</p>
  <p><em>FYI, This work fine in default mode of Chrome.
  A cookie setting of: <code>SameSite=None</code> is set on Site B.</em></p>