[swift] Firebase 意味がよくわからないバグがあります。

#質問したいこと
Firebaseを使ったアプリを作っています。
そこで、

reason: '`[FIRApp configure];` (`FirebaseApp.configure()` in Swift) could not find a valid GoogleService-Info.plist in your project. Please download one from https://console.firebase.google.com/.'

というエラーで止まってしまいます。

#コード
######サインアップの画面（一番最初の画面です）

swift
1//accountViewcontroller
2import UIKit
3import Firebase
4import FirebaseAuth
5
6class AccountViewController: UIViewController, UITextFieldDelegate {
7    var account: FirebaseApp!
8    
9    @IBOutlet private weak var nameTextField: UITextField!
10    @IBOutlet private weak var emailTextField: UITextField!
11    @IBOutlet private weak var passwordTextField: UITextField!
12    
13    @IBAction private func didTapSignUpButton() {
14        let email = emailTextField.text ?? ""
15        let password = passwordTextField.text ?? ""
16        let name = nameTextField.text ?? ""
17        
18        Auth.auth().createUser(withEmail: email, password: password) { [weak self] result, error in
19            guard let self = self else { return }
20            if let user = result?.user {
21                let req = user.createProfileChangeRequest()
22                req.displayName = name
23                req.commitChanges() { [weak self] error in
24                    guard let self = self else { return }
25                    if error == nil {
26                        user.sendEmailVerification() { [weak self] error in
27                            guard let self = self else { return }
28                            if error == nil {
29                                // 仮登録完了画面へ遷移する処理
30                                // サインアップ完了のフラグを保持する
31                                UserDefaults.standard.set(true, forKey: "appSignUpStatusKey")
32                                UserDefaults.standard.synchronize()
33                            }
34                            self.showErrorIfNeeded(error)
35                        }
36                    }
37                    self.showErrorIfNeeded(error)
38                }
39            }
40            self.showErrorIfNeeded(error)
41        }
42                // サインアップ完了のフラグを保持する
43                UserDefaults.standard.set(true, forKey: "appSignUpStatusKey")
44                // ユーザー名を保存する
45                UserDefaults.standard.set(name, forKey: "userNameKey")
46                UserDefaults.standard.synchronize()
47        if (email == "" || password == "" || name == "") {
48            let message = "全てのフォームに記入して下さい。"
49            let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)
50            alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
51            self.present(alert, animated: true, completion: nil)
52        }
53            }
54
55    
56    private func showErrorIfNeeded(_ errorOrNil: Error?) {
57        // エラーがなければ何もしません
58        guard let error = errorOrNil else { return }
59        let message = "エラーが起きました" // ここは後述しますが、とりあえず固定文字列
60        let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)
61        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
62        present(alert, animated: true, completion: nil)
63    }
64    
65
66
67
68    // AccountViewControllerの想定です
69    override func viewDidLoad() {
70        super.viewDidLoad()
71        self.navigationController?.navigationBar.isHidden = true
72        
73        self.nameTextField.delegate = self
74        self.emailTextField.delegate = self
75        self.passwordTextField.delegate = self
76        
77        
78    }
79    
80    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
81        self.view.endEditing(true)
82    }
83}
84

######AppDelegate

swift
1//AppDelegate
2import UIKit
3import CoreData
4import Firebase
5
6@UIApplicationMain
7class AppDelegate: UIResponder, UIApplicationDelegate {
8
9
10
11    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
12        // Override point for customization after application launch.
13        FirebaseApp.configure()
14        return true
15    }
16
17    // MARK: UISceneSession Lifecycle
18
19    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
20        // Called when a new scene session is being created.
21        // Use this method to select a configuration to create the new scene with.
22        return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
23    }
24
25    func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
26        // Called when the user discards a scene session.
27        // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
28        // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
29    }
30
31    // MARK: - Core Data stack
32
33    lazy var persistentContainer: NSPersistentContainer = {
34        /*
35         The persistent container for the application. This implementation
36         creates and returns a container, having loaded the store for the
37         application to it. This property is optional since there are legitimate
38         error conditions that could cause the creation of the store to fail.
39        */
40        let container = NSPersistentContainer(name: "new_timer3")
41        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
42            if let error = error as NSError? {
43                // Replace this implementation with code to handle the error appropriately.
44                // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
45                 
46                /*
47                 Typical reasons for an error here include:
48                 * The parent directory does not exist, cannot be created, or disallows writing.
49                 * The persistent store is not accessible, due to permissions or data protection when the device is locked.
50                 * The device is out of space.
51                 * The store could not be migrated to the current model version.
52                 Check the error message to determine what the actual problem was.
53                 */
54                fatalError("Unresolved error (error), (error.userInfo)")
55            }
56        })
57        return container
58    }()
59
60    // MARK: - Core Data Saving support
61
62    func saveContext () {
63        let context = persistentContainer.viewContext
64        if context.hasChanges {
65            do {
66                try context.save()
67            } catch {
68                // Replace this implementation with code to handle the error appropriately.
69                // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
70                let nserror = error as NSError
71                fatalError("Unresolved error (nserror), (nserror.userInfo)")
72            }
73        }
74    }
75
76}
77
78

######Podfileの方も

swift
1//Podfile
2# Uncomment the next line to define a global platform for your project
3platform :ios, '9.0'
4
5target 'new_timer3' do
6  # Comment the next line if you don't want to use dynamic frameworks
7  use_frameworks!
8
9  # Pods for new_timer3
10pod 'Firebase/Database'
11pod 'Firebase/Core'
12pod 'Firebase/Firestore'
13pod 'Firebase/Auth'
14pod 'Firebase/Storage'
15  target 'new_timer3Tests' do
16    inherit! :search_paths
17    # Pods for testing
18  end
19
20  target 'new_timer3UITests' do
21    # Pods for testing
22  end
23
24end
25