curl -X POST https://www.unosend.co/api/v1/templates \
-H "Authorization: Bearer un_xxxxxxxxxx" \
-H "Content-Type: application/json" \
-d '{
"name": "Welcome Email",
"subject": "Welcome to {{company_name}}, {{first_name}}!",
"html": "<h1>Welcome, {{first_name}}!</h1><p>Thanks for joining {{company_name}}.</p>"
}'