Authorization: ********************X-API-Key: ********************curl --location 'https://my.xentree.com/api/learn/english/sessions/start' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
"module_id": "1f689912-a490-4ced-a99d-a21d7a5caeb2"
}'{
"session_id": "string",
"module_id": "string",
"started_at": "2019-08-24T14:15:22.123Z"
}