Excel write cell in the right row

Hello UIPath Team,
I Have a question for a very important project.

If a user form a excel List is not found in a databank an excel entry in the same row as the username must be made. Thats the important point.

like this

The Excel List checked with Each By Row funtion successively. As soon as a user does not exist in the Databank, then UIPath must do a Entry “not found” in the same row in Excel and go on with the loop and the next usernamer.

thank you very much