Update README.md

Author: masashi-sutou

README.md

@@ -49,8 +49,10 @@ and run
 
 ### Set up custom URL scheme
 
-set "studyplus-*{your consumer key}*" to URL Types.
+- set "studyplus-*{your consumer key}*" to URL Types.
 (ex. studyplus-MIoh79q7pfMbTUVA3BNsSeTaZRcOK3yg )
+- If you don't have consumerKey and consumerSecret, please contact https://info.studyplus.co.jp/contact/studyplus-api
+
 
 ![xcode](https://raw.github.com/studyplus/Studyplus-iOS-SDK/master/docs/set_url_scheme.png)