Add another way to find ms teams upn in readme

README.md

@@ -24,7 +24,9 @@ The channel name, eg: `#general` (optional).
 
 A string like this `"githubusername1:provideruserid1,githubusername2:provideruserid2,..."` to define the mapping between GitHub usernames and Slack/MS Teams user IDs (optional). Example: `"DavideViolante:UEABCDEFG,foobar:UAABCDEFG"`. Note: it's case sensitive! [How to find Slack User IDs](https://www.google.com/search?q=find+slack+user+id).
 
-For MS Teams, the provider user ID can be an [MS teams user ID or a UPN](https://www.google.com/search?q=find+ms+teams+upn) Example: `"DavideViolante:[email protected],foobar:[email protected]"`.
+For MS Teams, the provider user ID can be an [MS teams user ID or a UPN](https://www.google.com/search?q=find+%22microsoft+teams%22+userprincipalname+-office) Example: `"DavideViolante:[email protected]',foobar:[email protected]"`.
+
+Another hacky way (no code) to find the MS Teams UPN is the following: open MS Teams on your browser, click the 3 dots near your Team name, click Add member, open Google Chrome console Network tab Fetch/XHR category, type the email address, look for "searchV2" in the Network tab, click Response tab.
 
 ## Example usage