new drawer to different image locations

lib/data_provider/data_provider.dart

@@ -14,12 +14,17 @@ class Folder {
   Uri parent;
 
   Folder(this.items, this.self, this.parent);
+
+  @override
+  String toString() {
+    return 'Folder{items: $items, self: $self, parent: $parent}';
+  }
 }
 
 abstract class DataProvider {
   final List<String> validSuffix = [".jpg", ".jpeg", ".png"];
 
-  void connect();
+  Future<void> connect();
   Future<Folder> listOfFiles({Uri? uri});
   ImageProvider getImageProvider(Uri uri);
 }

lib/data_provider/local_data_provider.dart

@@ -9,7 +9,7 @@ class LocalDataProvider extends DataProvider {
   LocalDataProvider(this.initialPath);
 
   @override
-  void connect() {}
+  Future<void> connect() async {}
 
   @override
   Future<Folder> listOfFiles({Uri? uri}) async {

lib/data_provider/ssh_data_provider.dart

@@ -35,6 +35,7 @@ class SSHDataProvider extends DataProvider {
       username: username,
       onPasswordRequest: () => password,
     );
+    await sshClient?.authenticated;
 
     sftpClient = await sshClient?.sftp();
   }