curl --request POST \
--url https://api.smartermeasure.com/v3/users \
--header 'Authorization: Basic <encoded-value>' \
--header 'Content-Type: application/json' \
--data '
{
"GroupKey": 123,
"FirstName": "<string>",
"LastName": "<string>",
"Email": "<string>",
"InternalID": "<string>",
"Gender": "M",
"EthnicityID": 123,
"AgeRange": "<string>",
"HowManyCoursesTaken": "<string>",
"Custom": {}
}
'