[utils] Improve AstractStorage error message in constructor

beat/backend/python/utils.py

@@ -226,7 +226,11 @@ class AbstractStorage(object):
         if not all(
             [type(attr) == str for attr in [self.asset_type, self.asset_folder]]
         ):
-            raise TypeError("asset_type and asset_folder must be configure properly")
+            raise TypeError(
+                "asset_type and asset_folder must be configured properly\n"
+                "asset_type: {}\n"
+                "asset_folder: {}".format(self.asset_type, self.asset_folder)
+            )
 
         self.path = path
         self.json = File(self.path + ".json")