Make pylint and pycodestyle happy with the code

pyproject.toml

@@ -11,6 +11,8 @@ passlib = "^1.7.4"
 [tool.poetry.dev-dependencies]
 pytest = "^5.2"
 Werkzeug = "^1.0.1"
+pylint = "^2.7.2"
+pycodestyle = "^2.7.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]