Ошибка в коде в чем проблема?

Question

[Encoders]

ОШИБКА:
Traceback (most recent call last):
File "remember_my.py", line 25, in
greet_user()
File "remember_my.py", line 19, in greet_user
username = get_stored_username()
File "remember_my.py", line 6, in get_stored_username
username = json.load(f_obj)
File "C:\Users\smysh\AppData\Local\Programs\Python\Python37\lib\json\__init__.py", line 296, in load
parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
File "C:\Users\smysh\AppData\Local\Programs\Python\Python37\lib\json\__init__.py", line 348, in loads
return _default_decoder.decode(s)
File "C:\Users\smysh\AppData\Local\Programs\Python\Python37\lib\json\decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "C:\Users\smysh\AppData\Local\Programs\Python\Python37\lib\json\decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 2 column 1 (char 1)

import json
def get_stored_username():
    filename = 'username.json'
    try :
        with open(filename) as f_obj:
            username = json.load(f_obj)
    except FileNotFoundError:
        return None 
    else:
        return username 
def get_new_username():
        username = input("What is your name? ")
        filename = 'username.json'
        with open(filename,'w') as f_obj:
            json.dump(username,f_obj)
        return username
    
def greet_user():
    username = get_stored_username()
    if username :
        print("Welcome back, " + username + "!")
    else:
        username = get_new_username()
        print("We'll remember you when you come back, " + username + "!")
greet_user()

Comments

[Teslaman]

Отформатируйте код и трейсбек ошибки покажите.