curl --request POST \
--url https://api.example.com/v1/Accounts/{account_sid}/SpeechCredentials \
--header 'Content-Type: application/json' \
--data '
{
"access_key_id": "AKIXXXXXXXXXXXXX",
"secret_access_key": "****************************",
"use_for_stt": true,
"use_for_tts": true,
"vendor": "aws"
}
'