Using scp: "No such file or directory" when scripting BASH

Question

I wrote a script that would zip a folder and then store it another. So far this is working great. But now I want to send it using scp. I want to use eval so I can change them easily. But when I use it to send the file to some destination it always tells me that the the directory or file does not exist. If I do it without $scriptd then it is working like a charm.

Any ideas why?

    #!/bin/bash
    
    # Implementation of variables
    today=$(date +"%Y-%m-%d")
    source="~/Documents"; eval source=$source
    target="~/Backups"; eval target=$target
    scriptd="~/Documents/Backups"; eval scriptd=$scriptd
    
    main(){
        backup
    }
    
    backup(){
        tar -zvcf $today.tar.gz -P $source
        rsync -zhap --progress $scriptd/$today.tar.gz $target
        rm $scriptd/$today.tar.gz
        scp $target/$today.tar.gz pi@I-Am-An-IP:$scriptd

    }
    
    main
    
    exit 0