Login With Apple in ios 14.You can use this code in swiftui. if you facing any issue comment me below.

    VStack {
        if #available(iOS 14.0, *) {
            SignInWithAppleButton(
                .signIn,
                onRequest: { request in
                    // 1
                    request.requestedScopes = [.fullName, .email]
                    
                    let appleIDProvider = ASAuthorizationAppleIDProvider()
                        let request = appleIDProvider.createRequest()
                        request.requestedScopes = [.fullName, .email]
                },
                
                onCompletion: { (result) in
                    switch result {
                    case .success(let authorization):
                        //Handle autorization
                        
                        if let appleIDCredential = authorization.credential as? ASAuthorizationAppleIDCredential {
                            let userId = appleIDCredential.user
                            let identityToken = appleIDCredential.identityToken
                            let authCode = appleIDCredential.authorizationCode
                            let email = appleIDCredential.email
                            let givenName = appleIDCredential.fullName?.givenName
                            let familyName = appleIDCredential.fullName?.familyName
                            let state = appleIDCredential.state
                            
                            print(userId)
                            print(identityToken)
                            print(authCode)
                            print(email)
                            print(givenName)
                            print(familyName)
                            print(state)
                            // Here you have to send the data to the backend and according to the response let the user get into the app.
                          
                        }
                        break
                    case .failure(let error):
                        //Handle error
                        break
                    }
                }
            )
        } else {
            // Fallback on earlier versions
        }
    }.frame(width:300,height: 60).background(Color.orange.opacity(0.4)).cornerRadius(10).padding([.top], 5)