proceed if user exist

debian/adduser.sh

@@ -7,7 +7,5 @@ user=gitlab
 echo "Creating/updating $user user account..."
 adduser --home /usr/share/$user --gecos "$user user" --shell /bin/sh \
 	--quiet --disabled-password $user || {
-  # adduser failed. Why?
-  # unknown adduser error, simply exit
-  exit 1
+echo "Proceeding with existing $user user..."
   }