#40: Use the Rust AuthenticationService.

* Update SDK package to 1.0.12-alpha.
* Use an app group for storage and stop stripping the http from the homeserver when configuring the service.
* Rename access token to restore token.
* Remove matrix.org server description inline with latest FTUE changes.

ElementX/Sources/Services/Authentication/AuthenticationServiceProxyProtocol.swift

@@ -0,0 +1,27 @@
+//
+//  AuthenticationServiceProxyProtocol.swift
+//  ElementX
+//
+//  Created by Doug on 29/06/2022.
+//  Copyright © 2022 Element. All rights reserved.
+//
+
+import Foundation
+
+enum AuthenticationServiceError: Error {
+    case invalidServer
+    case invalidCredentials
+    case invalidHomeserverAddress
+    case accountDeactivated
+    case failedLoggingIn
+}
+
+@MainActor
+protocol AuthenticationServiceProxyProtocol {
+    var homeserver: LoginHomeserver { get }
+    
+    /// Sets up the service for login on the specified homeserver address.
+    func configure(for homeserverAddress: String) async -> Result<Void, AuthenticationServiceError>
+    /// Performs a password login using the current homeserver.
+    func login(username: String, password: String) async -> Result<UserSessionProtocol, AuthenticationServiceError>
+}