Just pull the right gpg key directly

bin/omarchy-iso-sign

@@ -1,14 +1,15 @@
 #!/bin/bash
 
 if [ $# -eq 0 ]; then
-  echo "Usage: omarchy-iso-sign [gnupg-user] [release/omarchy.iso]"
+  echo "usage: omarchy-iso-sign [release/omarchy.iso]"
   exit 1
 fi
 
-if ! pacman -Q gnupg >/dev/null; then
-  sudo pacman -S --noconfirm --needed --quiet gnupg
-  echo "You'll need to generate a new key with: gpg --full-generate-key"
-  echo "Then get your keyid from: gpg --list-secret-keys --keyid-format=long"
+if ! pacman -q gnupg >/dev/null; then
+  sudo pacman -s --noconfirm --needed --quiet gnupg
+  echo "you'll need to generate a new key with: gpg --full-generate-key"
 fi
 
-gpg --local-user $1 --output $2.sig --detach-sig $2
+gnupg-user-key=$(gpg --list-secret-keys --keyid-format=long | awk '/^[[:space:]]/{print $1; exit}')
+
+gpg --local-user $gnupg-user-key --output $2.sig --detach-sig $2