Add new filter: auth0_die_on_login_output
Add new filter: auth0_die_on_login_output

Add documentation and a sample for the new `auth0_die_on_login_output` filter in WP-Auth0 3.9.0.
auth0/docs,jeffreylees/docs,auth0/docs,jeffreylees/docs,jeffreylees/docs,auth0/docs,yvonnewilson/docs,yvonnewilson/docs,yvonnewilson/docs