Firebase phone Authentication failes

问题

I wanted to do Firebase Login using Phone Auth. As I am developing and I don't have an access to device & Apple developer account, so I went to implement this feature using

reCAPTCHA verification

but I get this following error

{"error":{"code":403,"message":"Requests from this ios client application are blocked.","errors":[{"message":"Requests from this ios client application are blocked.","domain":"global","reason":"forbidden"}],"status":"PERMISSION_DENIED"}}

I have implemented that as it has been shown in the documentation.

Below is the code from AppDelegate.swift:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    FirebaseApp.configure()
    return true
}

// For iOS 9+
func application(_ application: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any]) -> Bool {
    if Auth.auth().canHandle(url) {
        return true
    }
    return false
    // URL not auth related, developer should handle it.
}

Below is the code from ViewController.swift:

@IBAction func didTapSignUp(_ sender: Any) {
    PhoneAuthProvider.provider().verifyPhoneNumber("+919637892151", uiDelegate: nil) { (verificationId, error) in
        if let error = error {
            // It always comes here
            print(error.localizedDescription)
        }
        if let verificationId = verificationId {
            print(verificationId)
            UserDefaults.standard.set(verificationId, forKey: "authVerificationID")
        }
    }
}