Firebase 电话身份验证失败

Question

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")
        }
    }
}

Answer 1

I followed this answer and it works.

"set the API key Key restriction in Google Console to NONE"

I'm perplexed though because what is the purpose of it if only NONE works?