How can I login WHMCS in an other domain, then redirect to WHMCS clientarea?

[malin]

Hi, friends:

I have a `b.example.com`  for display my website, and I have a requirement, in it there is a login form,  I want use my whmcs(exapmle.com)'s login API, when login success, it will transfer to `example.com`.

How can we do this? 

I searched the API index, find a API named [Validate Login](https://developers.whmcs.com/api-reference/validatelogin/), I am not sure whether is this for I use in my `b.example.com` to login clients.

So I checked it, there get 403 Forbidden error.

 

Request General:

1. Request URL:
   http://www.example.com/includes/api.php
2. Request Method:
   POST
3. Status Code:
   403 Forbidden
4. Remote Address:
   15.11.42.58:80
5. Referrer Policy:
   no-referrer-when-downgrade

 

 

Request Form data:

 

1. action:
   ValidateLogin
2. email:
   726gg35611@gmail.com
3. password2:
   123456
4. responsetype:
   json

 

and my example is with CDN on it.

Edited November 12, 2019 by malin