Add a couple more error messages during authentication. (#2497)

* Add copy for error when signing in with refresh tokens enabled.

* Show an error when a server's well-known file is invalid.

* Changelog.

* Fix wrong alert.

ElementX/Sources/Services/Authentication/AuthenticationServiceProxy.swift

@@ -80,6 +80,9 @@ class AuthenticationServiceProxy: AuthenticationServiceProxyProtocol {
             
             homeserverSubject.send(homeserver)
             return .success(())
+        } catch AuthenticationError.WellKnownDeserializationError(let error) {
+            MXLog.error("The user entered a server with an invalid well-known file: \(error)")
+            return .failure(.invalidWellKnown(error))
         } catch AuthenticationError.SlidingSyncNotAvailable {
             MXLog.info("User entered a homeserver that isn't configured for sliding sync.")
             return .failure(.slidingSyncNotAvailable)

ElementX/Sources/Services/Authentication/AuthenticationServiceProxyProtocol.swift

@@ -31,6 +31,7 @@ enum AuthenticationServiceError: Error {
     case invalidServer
     case invalidCredentials
     case invalidHomeserverAddress
+    case invalidWellKnown(String)
     case slidingSyncNotAvailable
     case accountDeactivated
     case failedLoggingIn