<key>CFBundleURLTypes</key>
    <array>
        <dict>
            <key>CFBundleURLName</key>
            <string>com.pineapplestudio.todelete</string>
            <key>CFBundleURLSchemes</key>
            <array>
                <string>AppDemo</string>
            </array>
        </dict>
    </array>


 @IBAction func createAlipaySource(_ sender: UIButton) {
        let sourceParams = STPSourceParams.alipayParams(withAmount: 1000, currency: "usd", returnURL: "AppDemo://stripe-redirect")
        STPAPIClient.shared().createSource(with: sourceParams) { (source, error) in
            if let error = error {
                print(error.localizedDescription)
            } else {
                if let alipayUrl = source?.redirect?.url {
                    UIApplication.shared.open(alipayUrl, options: [:], completionHandler: nil)
                }
            }
        }
    }