Sharepoint loginNames are not always emails

[skeskinen]

Code that checks if user is admin IsUserExistInGroup (link below) assumes that loginName you get from Sharepoint looks like email, but I'm seeing something like: i:0#.f|membership|name@something.onmicrosoft.com

https://github.com/OfficeDev/Virtual-Health-Templates/blob/master/HealthCare.Core/Data/SharepointRepository.cs#L189

I fixed my problem by just splitting on | and taking the last piece, but there might be other formats too.