diff --git a/lib/src/api_service_impl.dart b/lib/src/api_service_impl.dart
index af0a8e0..4bf51b8 100644
--- a/lib/src/api_service_impl.dart
+++ b/lib/src/api_service_impl.dart
@@ -229,7 +229,10 @@ class ApiServiceImpl implements ApiService {
   }
 
   @override
-  String getBlobUrl(String path) => '$blobUrl$path';
+  String? getBlobUrl() => blobUrl;
+
+  @override
+  String getBlobUrlPath(String path) => '$blobUrl$path';
 
   @override
   String getFileUploadUrl() {
diff --git a/lib/src/base/api_service.dart b/lib/src/base/api_service.dart
index 4e35f38..ffb1582 100644
--- a/lib/src/base/api_service.dart
+++ b/lib/src/base/api_service.dart
@@ -62,7 +62,9 @@ abstract class ApiService {
 
   void setBlobUrl(String blobUrl);
 
-  String getBlobUrl(String path);
+  String? getBlobUrl();
+
+  String getBlobUrlPath(String path);
 
   String getFileUploadUrl();