dont look for key if tilde is already configured

setup.sh

@@ -22,6 +22,8 @@ read tilde_name
 echo "What is your username for $tilde_name?"
 read tilde_username
 
+if ! grep -q "$tilde_username@$tilde_name" /tilde/tildes
+then
 	echo "Now you will need to provide tildelinux with your ssh private key"
 	echo "By whatever means, place your private key in the /tilde/key directory"
 	echo "Here is a shell, once the key is in the proper location, simply type \"exit\" to close the shell and continue"
@@ -39,6 +41,13 @@ do
 	done
 	echo "Key file located at $key_file, testing connection..."
 	connection_test "$key_file" "$tilde_username" "$tilde_name"
+else
+	key_file="$(cat /tilde/tildes \
+		| grep -A4 "Host $tilde_username@$tilde_name" \
+		| grep "IdentityFile" \
+		| cut -f2 -d ' ')"
+	echo "$tilde_name found in /tilde/tildes, using $key_file as key file"
+fi
 
 echo "Configuring user..."
 configure_user "$key_file" "$tilde_username" "$tilde_name" "$startx_command"