Not sure how this error creeped in 😕 probably a new gem version or
other conflicting code
The problem was we were getting an `unpermitted param email` when
updating a user’s email address
This stackoverflow solution seems to work nicely 😌https://stackoverflow.com/questions/17384289/unpermitted-parameters-addi
ng-new-fields-to-devise-in-rails-4-0#answer-19036427