get https://api.splio.com/loyalty/v2/contacts//rewards
Get the list of a contact's reward (granted & used)
Error cases
Wrong cursor - see dedicated doc (400)
Contact ID does not exist (404)
{
"status": 404,
"errors": [
{
"error_key": "id",
"error": "wrong_value",
"error_description": "Record not found for id testmail.mail."
}
]
}