CSI Import

Any one know if there is a way to bulk import CSI's from a .csv file?  Or any kind of file?  Our virtual concerts have unique, per constituent, access codes and entering them one by one is not realistic. 

I am not even married to CSI's, it has been the quickest solution I have found for this problem.  Where ever the access codes live, it needs to only have a single line output returned so WordFly can pull on it.

Thanks for the help!