ios – 使用Firebase提供的无效API密钥

我得到的Facebook权限屏幕一切正常,但应用程序命中

FIRAuth.auth()?.signInWithCredential(credential) { (user,error) in

将返回此错误：请求中提供了无效的API密钥.

有人可以帮我吗

谢谢

这是我使用Facebook登录的功能代码.

@IBAction func signUpWithFacebook() {

    let fbLogin = FBSDKLoginManager()

    fbLogin.logInWithReadPermissions(["email"],fromViewController:self,handler: {
        (result,error) -> Void in

        if ((error) != nil) {
            print("Process error")
        } else if (result.isCancelled) {
            print("Cancelled");
        } else {
            print("Logged in");

            let accesstoken = FBSDKAccesstoken.currentAccesstoken().tokenString
            let credential = FIRFacebookAuthProvider.credentialWithAccesstoken(accesstoken)
            print(FBSDKAccesstoken.currentAccesstoken().tokenString)

            FIRAuth.auth()?.signInWithCredential(credential) { (user,error) in
                // ...
                if let user = user{
                    print(user.displayName)
                }
                else{

                    if let error = error {
                        print(error.localizedDescription)
                    }
                }
            }

        }
    })
}