curl --request PUT \
  --url https://api.aimtell.com/prod/user/ \
  --header 'Content-Type: application/json' \
  --header 'X-Authorization-Api-Key: <api-key>' \
  --data '
{
  "first_name": "<string>",
  "last_name": "<string>",
  "password": "<string>",
  "timezone": "<string>"
}
'

{
  "result": "success",
  "message": "User updated.",
  "user": {
    "uid": "ia123d",
    "timezone": "America/Los_Angeles",
    "registration_date": "2014-10-05 00:00:00",
    "last_login": "2015-10-01 04:03:20",
    "username": "dj@aimtell.com",
    "auth_token": "AUTH_TOKEN",
    "first_name": "DJ",
    "last_name": "Swanepoel",
    "trial": "0",
    "trial_end": "0000-00-00 00:00:00"
  }
}