Added exception catching for new user?
Added exception catching for new user?

ArcBees/slackbot-workout,prlakhani/slackbot-workout,Heyllow/slack-workout,emillinden/slackbot-workout,brandonshin/slackbot-workout,TeachersPayTeachers/slackbot-workout,jesseract/slackbot_exercise_bot,jesseract/slackbot_exercise_bot