updated access token ref due to change in getAuth

@janders223 @mguterl @danrye 

I've made the change to how the access token was retrieved.  There is one test for this code and it was passing even with the break.  Retrieving the email addresses from MP and sending the actual email happens async, so the page returns a 200 before the error happens.  Need a better testing strategy.  Dan has asked me to turn this over to Gaslight so I can focus on the Costrx board.