Add support for user methods

[philipmat]

https://www.sandbox.namecheap.com/support/api/methods.aspx

users

• [ ] getPricing — Returns pricing information for a requested product type.
• [ ] getBalances — Gets information about fund in the user's account.This method returns the following information: Available Balance, Account Balance, Earned Amount, Withdrawable Amount and Funds Required for AutoRenew.
• [ ] changePassword — Changes password of the particular user's account.
• [ ] update — Updates user account information for the particular user.
• [ ] createaddfundsrequest — Creates a request to add funds through a credit card
• [ ] getAddFundsStatus — Gets the status of add funds request.
• [ ] create — Creates a new account at NameCheap under this ApiUser.
• [ ] login — Validates the username and password of user accounts you have created using the API command namecheap.users.create.
• [ ] resetPassword — When you call this API, a link to reset password will be emailed to the end user's profile email id.The end user needs to click on the link to reset password.

users.address

• [ ] create — Creates a new address for the user
• [ ] delete — Deletes the particular address for the user.
• [ ] getInfo — Gets information for the requested addressID.
• [ ] getList — Gets a list of addressIDs and addressnames associated with the user account.
• [ ] setDefault — Sets default address for the user.
• [ ] update — Updates the particular address of the user