Retrieves an enumeration that contains the sign-in names of the identities for which a credential has been cached.
Optional. A string that indicates the type of credential that will be included in the returned enumeration. Can be one of the following values, or null.
Only the sign-in name is persisted.
Both the sign-in name and password are persisted.
The user is active at the time of the call.
A pointer to the location of the sign-in names of the authenticated identities for which credentials are cached.