Note: It's a good idea to close the Dev Tools between apps if you have multiple apps needing this.
- Open |View| -> |Toggle Service Developer Tools|
- Go to the |Network| tab
- Enable |Preserve log|
- Perform your authentication flow and wait for the the blank end-page
- Find the cancelled ACS endpoint request
- Right-click the entry, and select "Copy as fetch"
- Go to the |Console| tab
- Paste the request (you may need to type
allow pastingand hit Enter first) and press enter - Go back to the |Network| tab, you should now see that there is a new entry for a request to ACS (at the bottom of the list)
- In the |Response| view, locate the
<script>tag pair and copy its code contents
- Go back to the |Console| tab, paste and press enter
- Profit