cant' post

[csrgxtu]

i do following in my shell:

http -f POST http://localhost:8080/login name=archer password=archer
HTTP/1.1 500 Internal Server Error
Content-Length: 21
content-type: text/html

Internal Server Error

here is the output from server

2017-08-09 14:51:42,200 [ERROR] 'NoneType' object is not callable
2017-08-09 14:51:42,201 [ERROR] <traceback object at 0x7f29da08dbc8>