Unable to sign-in to Appwrite by following the documentation

import SwiftUI

class ViewModel: ObservableObject {
    @Published var email: String = ""
    @Published var password: String = ""
}

struct ContentView: View {
    @ObservedObject var viewModel = ViewModel()
    
    var body: some View {
        VStack {
            TextField(
                "Email",
                text: $viewModel.email
            )
            SecureField(
                "Password",
                text: $viewModel.password
            )
            Button(
                action: { Task {
                    try await Appwrite.onRegister(
                        viewModel.email,
                        viewModel.password
                    )
                }},
                label: {
                    Text("Register")
                }
            )
            Button(
                action: { Task {
                    try! await Appwrite.onLogin(
                        viewModel.email,
                        viewModel.password
                    )
                }},
                label: {
                    Text("Login")
                }
            )
        }
        .padding()
    }
}

#Preview {
    ContentView()
}

import Foundation
import Appwrite
import JSONCodable

class Appwrite {
    var client: Client
    var account: Account
    
    public init() {
        self.client = Client()
            .setEndpoint("https://cloud.appwrite.io/v1")
            .setProject("6672009b002541899792")
            .setSelfSigned(true)
        
        self.account = Account(client)
    }
    
    public func onRegister(
        _ email: String,
        _ password: String
    ) async throws -> User<[String: AnyCodable]> {
        try await account.create(
            userId: ID.unique(),
            email: email,
            password: password
        )
    }
    
    public func onLogin(
        _ email: String,
        _ password: String
    ) async throws -> Session {
        try await account.createEmailPasswordSession(
            email: email,
            password: password
        )
    }
    
    public func onLogout() async throws {
        _ = try await account.deleteSession(
            sessionId: "current"
        )
    }
}

let appwrite = Appwrite()
appwrite.onLogin(...)