Merge pull request NARKOZ#50 from Goldenson/patch-2

Update smack_my_bitch_up.rb

Author: NARKOZ

smack_my_bitch_up.rb

@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 # Exit early if no sessions with my username are found
-exit if `who -q`.include? ENV['USER']
+exit unless `who -q`.include? ENV['USER']
 
 require 'dotenv'
 require 'twilio-ruby'