Customize Various Aspects of Wordpress Site

I need someone to help with a few aspects of customization to my wordpress site [login to view URL] . The first part to the project is the connection of the google login api to my site, . There is the capability to do this within the theme, however it does not seem to be working correctly. I need the api to auto-fill the following information when a user signs up: First Name Last Name Email Profile Picture (if they have one on google) I also need there to be a verification process that only allows users with an email address from @[login to view URL] to sign up. The @[login to view URL] emails are google apps run. If a user tries to connect a gmail account that is not registered with a [login to view URL] email address, or they try to register an account (without the google api) with an email address that is not from [login to view URL], they should be denied an account. Here is info on how the login verification works: [login to view URL] Here is info on how the gmail api integrates with the theme: [login to view URL] The final aspect of the project is that I would like to have the contact information of users to not be displayed unless someone is signed up for the website. For example, on this page ([login to view URL]) you should not be able to view the phone or email address of the user listing the property if you are not signed in to an account. Please let me know if you have any questions or concerns about any aspects of this project. Thanks!