After being asked on LinkedIn to publish both the apps that I built for the User Security Admin walk-through I have done so on Dynamics Communities Power Platform Bank

Stand-Alone Security / User App

The first one, which if you remember is a stand-alone application detailed here can be downloaded here

https://dynamics365society.uk/powerappsbanklist/dynamics-ce-security-user-profile-powerapp/

Embedded Security App

The second app was the one after I converted the original to a embedded form in the User record, detailed here

https://dynamics365society.uk/powerappsbanklist/dynamics-ce-embedded-security-powerapp/

Both apps require the custom connector to read and update teams and role, which are included in the package.

Please let me know if it works for you via Twitter or LinkedIn

Thanks goes to Those Dynamics Guys for the great Dynamics Community & the PPB as well as Joergen Schladot to giving me the kick up the arse to get it done.