Implement Slack authentication on iOS

Apple/App/BurrowView.swift

@@ -1,9 +1,29 @@
+import AuthenticationServices
 import SwiftUI
 
+#if !os(macOS)
 struct BurrowView: View {
+    @Environment(\.webAuthenticationSession)
+    private var webAuthenticationSession
+
     var body: some View {
         NavigationStack {
             VStack {
+                HStack {
+                    Text("Networks")
+                        .font(.largeTitle)
+                        .fontWeight(.bold)
+                    Spacer()
+                    Menu {
+                        Button("Hack Club", action: addHackClubNetwork)
+                        Button("WireGuard", action: addWireGuardNetwork)
+                    } label: {
+                        Image(systemName: "plus.circle.fill")
+                            .font(.title)
+                            .accessibilityLabel("Add")
+                    }
+                }
+                .padding(.top)
                 NetworkCarouselView()
                 Spacer()
                 TunnelStatusView()
@@ -11,9 +31,35 @@ struct BurrowView: View {
                     .padding(.bottom)
             }
             .padding()
-            .navigationTitle("Networks")
+            .handleOAuth2Callback()
         }
     }
+
+    private func addHackClubNetwork() {
+        Task {
+            try await authenticateWithSlack()
+        }
+    }
+
+    private func addWireGuardNetwork() {
+        
+    }
+
+    private func authenticateWithSlack() async throws {
+        guard
+            let authorizationEndpoint = URL(string: "https://slack.com/openid/connect/authorize"),
+            let tokenEndpoint = URL(string: "https://slack.com/api/openid.connect.token"),
+            let redirectURI = URL(string: "https://burrow.rs/callback/oauth2") else { return }
+        let session = OAuth2.Session(
+            authorizationEndpoint: authorizationEndpoint,
+            tokenEndpoint: tokenEndpoint,
+            redirectURI: redirectURI,
+            scopes: ["openid", "profile"],
+            clientID: "2210535565.6884042183125",
+            clientSecret: "2793c8a5255cae38830934c664eeb62d"
+        )
+        let response = try await session.authorize(webAuthenticationSession)
+    }
 }
 
 #if DEBUG
@@ -24,3 +70,4 @@ struct NetworkView_Previews: PreviewProvider {
     }
 }
 #endif
+#endif