curl --location --request POST '/api/create-message' \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data-raw '{
"authkey": "{{authkey}}",
"appkey": "{{appkey}}",
"channel": "telegram",
"to": "@username",
"message": "Caption text",
"file": "https://example.com/document.pdf"
}'{}