curl --request POST \
  --url https://api.example.com/{version}/realtime-keys/collection \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "session_id": 123,
  "source_type": "<string>",
  "reference_id": "<string>"
}
'

{
  "access_token": "<string>",
  "expires_in": 123
}