Upgrade UserID to a structure

src/utils/user_data_utils.rs

@@ -28,7 +28,7 @@ pub fn user_data_path(uri: &Path) -> PathBuf {
 /// This function returns the relative folder path in user data directory where the file can be
 /// created
 pub fn prepare_file_creation(user_id: UserID, folder: &str) -> ResultBoxError<PathBuf> {
-    let subfolder = match user_id {
+    let subfolder = match user_id.id() {
         0 => Path::new(folder).to_path_buf(),
         id => Path::new(folder).join(to_string(&id)?)
     };