let testURL = URL(string: "http://www.example.com")
let loginProtectionSpace = URLProtectionSpace(host: (testURL?.host)!, port: 0, protocol: testURL?.scheme, realm: nil, authenticationMethod: NSURLAuthenticationMethodHTTPDigest)
let credentialTest = URLCredential(user: "foo", password: "bar", persistence: .permanent)
URLCredentialStorage.shared.setDefaultCredential(credentialTest, for: loginProtectionSpace)

// Just trying to make sure that my credentialTest is really stored, but getting  someCredentials = nil how so?
let someCredentials = URLCredentialStorage.shared.credentials(for: loginProtectionSpace)