Get free disk space for different servers with separate credentials

I'm trying to query Disk space info on Grid box and Export it to CSV.

I was able to use Marc Weisel's script to make it use different credentials. I used computers.csv

to store the computer name and referenced credentials. This is working although the problem I'm facing is that Grid box opens for all the servers mentioned in the csv.

I want to view all disk space information on the same grid box.

Below are my script and module I'm using

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Thanks in advance