Searching for multiple users at once in Community

It would be very helpful to be able to search on multiple users at once- add in names separated by semicolons or commas or add an excel spreadsheet and have AI index the member list. 

Use Case: I have a list of 140 people I need to add to a user group. Right now, I have to search on each individual email address, then copy the username and add each one to the user group manually. Takes about 1 minute for each person as it's such a manual process. 

Thank you, S