BB2-3556: Remove references to BBUser10001-39999

Author: Shivam Tiwari

README.md

@@ -54,7 +54,7 @@ To see the process of authenticating with Blue Button via Medicare.gov and retri
 
 To ensure data displays properly in the sample application please use a
 Blue Button Sandbox user that has PDE (Part-D Events) EoBs (Explanation of Benefits). An example of a user with this
-data would be: BBUser29999 (PWD: PW29999!) or BBUser29998 (PWD: PW29998!)
+data would be: BBUser10000 (PWD: PW10000!) or BBUser09999 (PWD: PW09999!)
 
 ## Development