Member login

and what about for password forgot or password change?
My main problem is :
Login details of customers must sent to another site for registration.
After that when a member want to change his profile or retrieve his own member information the other site gives some API commands to control these requests.
(example :https://00.00.000.0000/API/Request.ashx?command=getuserinfo&username=_&password=_&customer=_&customerpassword=_)
Ihaven’t the experience and skills for that integration.My question is if wix development team can do that for me? If the point is to upgrade , no problem.