curl --request POST \
  --url https://sandbox.prezio.eu/api/users/ \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "username": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "position": "<string>",
  "interested_use_cases": "<string>",
  "email": "jsmith@example.com",
  "prezio_updates_opt_in": true,
  "signup_country": "<string>",
  "password": "<string>"
}'

{
  "username": "test1234",
  "first_name": "test1234",
  "last_name": "test1234",
  "position": "CEO",
  "interested_use_cases": "Live API",
  "email": "test1234@test.com",
  "prezio_updates_opt_in": false,
  "signup_country": "Denmark"
}