I need to remove a number of users from a security group, but not all the users. My plan was to use remove-adgroupmember. I tried to use both a text file with get-content and a csv with import-csv. It's a modified script I found to add users. I get an error message stating 'Remove-ADGroupMember : Cannot validate argument on parameter 'Members'. The argument is null or empty. Provide an argument that is not null or empty,'