xe.com api integrate with postman:authentication

According to xe.com document we have to use the basic auth and they not provide information about the credentials.

curl –i -u account_id:api_key "https://xecdapi.xe.com/v1/account_info/" 

But in order to login you should provide the Account ID  for username and the Account API KEY  for password for login, which is given after creating the account.