Internal Error 500 on Login

Issue:

Getting an internal error when trying to login with either a username or email when "Require users to login with their passwords" is NOT enabled, but "Enable user authentication" is enabled.

The error occurs in this file: https://github.com/lokenx/plexrequests-meteor/blob/master/server/methods/authentication/plexAuthentication.js

In the function 'checkPlexUser', specifically in the return case. This is because earlier, there is an if condition:

if (Settings.find({}).fetch()[0].plexAuthenticationPASSWORDS) {
    // If passwords are required check full login
    var userInfo = Meteor.call('plexLogin', plexLogin, plexPassword)
    var plexUsername = userInfo.username
}

plexUsername is not defined if plexAuthenticationPASSWORDS isn't enabled, and in the return:

return (friendsList.indexOf(plexUsername.toLowerCase()) > -1), the toLowerCase() function fails on a null variable.

Attempted Solution:

I set plexUsername before the if condition to the plexLogin supplied to the function, and this worked and allowed login via plex username but it now fails to login throwing an incorrect login error instead. This is because that if statement fetched the username via the login information.

I am not sure if the Plex API allows you to fetch a username from an email without a password.