1. Creating a NSURLProtectionSpace for basicAuthentication
2. Creating NSURLCredential and store it in NSURLProtectionSpace
3. Adding created credentials to corresponding protection space
4. Remove all the credentials from stored
5. Invalidate authentication if failureCount exceeds 5 attempts
6. Cancel authentication challenge if authentication failure exceeds 5 retries.

  username: user1 
  password: user1

  username: user10
  password: user10

Greg Stein - for his WebDAV Testing Server (http://test.webdav.org/)