credential.rb in twilio-ruby-5.0.0.rc25

- old
+ new

@@ -25,11 +25,14 @@
 
           ##
           # Access the public_key
           # @param [String] sid The Credential Sid that uniquely identifies the Credential
           #   to fetch
-          # @return [PublicKeyList] PublicKeyList
+          # @return [PublicKeyList] if a(n) PublicKeyList object was created.
+          # @return [PublicKeyContext] if a(n) PublicKeyContext object was created.
           def public_key(sid=:unset)
+            raise ArgumentError, 'sid cannot be nil' if sid.nil?
+
             if sid != :unset
               return PublicKeyContext.new(
                   @version,
                   sid,
               )
\ No newline at end of file