How should you complete the relevant code?

You are developing a Windows Store banking app. Theapp communicates with the bank by using a secure
web service.
You need to ensure that users can securely store and retrieve web service credentials and delete stored
credentials.
How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct
locations in the answer area. Each code segment maybe used once, more than once, or not at all. You may
need to drag the split bar between panes or scroll to view content.)

Answer:

Explanation: