Need to concatenate String values based on User Email Address

Hi All,

I have a License report where each user and it will hold multiple lines of entries with respect to their assigned licenses. I would like to combine the User license details for each user and put them on a cell separated by Comma. Also, it will have duplicate license name for each user, We need to pick the unique licenses and need to concatenate them with comma. Below is a sample exported report and the Required output format.

Looking for some help on this. Thanks in Advance!!