Skipping test when access and secret keys env. vars are not provided

avatar-realm-resource/src/test/java/org/gcube/keycloak/avatar/storage/s3/MinioAvatarStorageTest.java

@@ -28,6 +28,7 @@ public class MinioAvatarStorageTest {
         String secretKey = System.getenv(SECRET_KEY_ENV);
         if (accessKey == null || secretKey == null) {
             logger.error("Cannot proceed with tests without access and secret keys");
+            return;
         }
         Configuration minioConfig = new Configuration(ENDPOINT_URL, accessKey, secretKey, BUCKET);