curl --request POST \
  --url https://api.nitrosend.com/v1/signup \
  --header 'Content-Type: application/json' \
  --data '
{
  "user": {
    "email": "jsmith@example.com",
    "password": "<string>",
    "first_name": "<string>",
    "last_name": "<string>",
    "mobile": "<string>",
    "password_confirmation": "<string>"
  }
}
'

{
  "id": 123,
  "first_name": "<string>",
  "last_name": "<string>",
  "email": "jsmith@example.com",
  "mobile": "<string>",
  "country_code": "<string>",
  "admin": true,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}