api Zimbra and wordpress or whmcs

I need to create a whmcs module or WordPress plugin. I prefer jcourey to create forms Zembra offer documentation for api integration Details I need php, api WordPress, and whmcs developer to write a clean code to 1- Create custom login, register, and cannot login links webpage to zembra server 2-in case customer login successfully, then client can access his [login to view URL] clients logout, they should return to same page. 3-if customer click on register, then display a form to register a new email account , and send details to his registered mail and WordPress/whmcs account page. 4-different domains may be used. 5-different zimbra ip address may be used. 6-if client click on forget password, you know what should be done to recover it. 7-security questions, and account sms vitrifaction is a plus for new account. 8-must check if the username available or not, for each domain. 9-i may need offer option for free account, or paid account. 10-set quota for each account, offer 7 days trail, and 0 MB quota, only option to redirect his email user email 11- ability to add domain or sub domain to zimbra server Zimbra offer documentation for api integration Thank you