lib/twilio-ruby/rest/chat/v1.rb in twilio-ruby-5.0.0.rc24 vs lib/twilio-ruby/rest/chat/v1.rb in twilio-ruby-5.0.0.rc25

@@ -16,18 +16,22 @@
           @credentials = nil
           @services = nil
         end
 
         def credentials(sid=:unset)
-          if sid == :unset
+          if sid.nil?
+            raise ArgumentError, 'sid cannot be nil'
+          elsif sid == :unset
             @credentials ||= CredentialList.new self
           else
             CredentialContext.new(self, sid)
           end
         end
 
         def services(sid=:unset)
-          if sid == :unset
+          if sid.nil?
+            raise ArgumentError, 'sid cannot be nil'
+          elsif sid == :unset
             @services ||= ServiceList.new self
           else
             ServiceContext.new(self, sid)
           end
         end
\ No newline at end of file