curl --request POST \
  --url https://api.doppapp.com/v1/private/create_user \
  --header 'Content-Type: application/json' \
  --header 'x-auth-token: <x-auth-token>' \
  --data '{
  "account_address": "<string>",
  "password": "<string>",
  "private_key": "<string>",
  "token": "<string>",
  "user_name": "<string>"
}'

{
  "password": "<string>",
  "token": "<string>",
  "user_name": "<string>"
}