Use a Discord webhook.

WebhookConsole.sh

#!/bin/bash

echo -n "URL: "
read url

echo -n "Username: "
read name

echo -n "Image URL: "
read image

echo "Type 'end' to end the content. E.g:"
echo "test"
echo "end"
echo
echo "Content:"

content=""
first="true"
while true; do
	read line
	if [ "$line" == "end" ]; then
		break
	fi
	if [ "$first" == "true" ]; then
		first="false"
	else
		content="$content"$'\n'
	fi
	content="$content$line"
done
curl "$url" --data-urlencode "content=$content" --data-urlencode "avatar_url=$image" --data-urlencode "username=$name"