Security Concerns!

[badita (Mihai Badita)]

You keep the password in a Credential and convert the SecureString to string.
You’ll still using the SecureString type.

Convert SecureString to String - Get Secured Credential

As Genfour suggested we need to create an activity that returns a string from a SecureString. Until then String plainStr = new System.Net.NetworkCredential(string.Empty, secureStr).Password should work