curl --request POST \
  --url https://api.example.com/system/runtime-credentials \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "connection_id": "<string>",
  "label": "<string>",
  "source": "<string>",
  "type_permissions": {},
  "extension_permissions": {},
  "edge_permissions": {},
  "ttl_seconds": 1830
}
'

{
  "id": "<string>",
  "api_key": "<string>",
  "connection_id": "<string>",
  "label": "<string>",
  "source": "<string>",
  "expires_at": "<string>",
  "created_at": "<string>"
}