Method: Retrieve membership tags.

Method: Determine if sales page redirection is enabled

Method: Retrieve an instance of the Post Instructors model

Method: Retrieve courses associated with the membership

Method: Performs a WPDB query to retrieve posts associated with the membership

Method: Remove a course from auto enrollment

Method: Retrieve a list of posts associated with the membership

Method: Save instructor information

Method: Add data to the membership model when converted to array.