shell script using imagemagick cli

generate.sh

#!/bin/bash
arr=(	"user1"
        "user2"
        "user3"
)
for i in "${arr[@]}"
do
    convert -font 'Sacramento' -fill '#CC6478' -pointsize 42 -gravity center -draw "text 90,-20 '$i'" template.png ./outputDir/$i.png
    convert -font helvetica -fill '#444' -pointsize 18 -gravity northwest -draw "text 264,425 '15 Aug 2020'" ./outputDir/$i.png ./outputDir/$i.png
    convert -composite -gravity northwest -geometry +550+340 ./outputDir/$i.png signature.png ./outputDir/$i.png
done