SwiftUI Login Screen

Login.swift

struct Credentials {
	var email: String = ""
	var password: String = ""
}

func authenticate(withCredentials credentials: Credentials, completion: @escaping (String?, Error?) -> Void) {
	let session = URLSession(configuration: .default)
	let endpoint = URL(string: "http://localhost:3000/token")
	
	session.dataTask(with: endpoint!) { data, response, error in
		DispatchQueue.main.async {
			completion("example-token-need-to-pluck-it-from-data-or-response???", error)
		}
	}.resume()
}

struct Login: View {
	@State private var credentials = Credentials()
	@State private var error: Error? = nil
	
	func attemptLogin() {
		self.error = nil

		authenticate(withCredentials: self.credentials, completion: { accessToken, error in
			self.error = error
			self.credentials.password = ""
			// now check if accessToken is available, if so what do I do with it here?
			// also, how do we then navigate to another screen from here (without a button action 🤔)
		})
	}

	var body: some View {
		VStack(spacing: 30) {
			TextField("Email", text: $credentials.email)
				.padding()
				.background(Color.white)
				.clipShape(RoundedRectangle(cornerRadius: 5))
			SecureField("Password", text: $credentials.password)
				.padding()
				.background(Color.white)
				.clipShape(RoundedRectangle(cornerRadius: 5))
			Button(action: self.attemptLogin) {
				Text("Login")
			}
			.padding(10)
			.frame(width: UIScreen.main.bounds.width / 2)
			.background(Color.accentColor)
			.foregroundColor(Color.white)
			.cornerRadius(5)
		}
	}
}