Master

server/api/errors.py

 from fastapi import status as http_status
 
 
+class UserPermissionError(Exception):
+    status = http_status.HTTP_403_FORBIDDEN
+
+
 class DataNotFoundWarning(Warning):
     status = http_status.HTTP_204_NO_CONTENT
 
 
 class NoDataForKeyError(Exception):
-    pass
+    status = http_status.HTTP_410_GONE
 
 
 class ItemNotFoundError(Exception):
-    pass
+    status = http_status.HTTP_404_NOT_FOUND
 
 
 class ProjectNotFoundError(Exception):
-    status = 400
+    status = http_status.HTTP_400_BAD_REQUEST
 
 
 class UserNotFoundError(Exception):