@since: 1.0.0

Method: Ensure the user can get redirected back to the origin site after a password redirect.

Method: In Multisite during the initial signup processing we need to capture the form data to use later when the user is activated.

Method: In Multisite when the user activates the new account we transfer the meta data to the user_meta table.

Method: Filter the network site url.

Method: Get or create instance object of class.

Method: Called when the Signup process starts.

Method: Called when the Activate process starts.