all i needed was -L to make it work

login-mailer.sh

@@ -39,7 +39,7 @@ if echo "$NEW_LINES" | grep -q "sshd.*Accepted"; then
   RESPONSE_CODE=$(curl -s -o /dev/null -w "%{http_code}" \
     -H "Content-Type: application/json" \
     -d "$JSON_PAYLOAD" \
-    "$ENDPOINT")
+    -L "$ENDPOINT")
 
   if [[ "$RESPONSE_CODE" -ne 200 ]]; then
     log_message "Failed to send login alert. Response code: $RESPONSE_CODE"