Website Upgrade - Add Authentication

We currently have a webpage that installs a enterprise iOS application. Currently, this page has no authentication to install the application, we would like to add a basic authorization scheme to the website so users are required to enter a username and password before being directed to the correct install page. The project requirements are as follows: - Implement basic user authentication - must be easy to add and remove authorized users. - Implement page redirect based on user credentials entered. - Block direct linking to redirected user pages - i.e., a user can log in once and then bookmark the redirect page for future use. - Add page redirect action on existing button action. - Add secondary button on main install page that links to a page product version page. - Design product version page that includes the following - product version, release date, install button.