login by wexin qrcode

login id generate:
```python
def generate_qr_login_id():

"""

Generate a unique id for qr code login

word-by-word copied from js code

"""

rand_str = f"{int(time.time() * 1000)}{random.random()}"

return md5(rand_str.encode()).hexdigest()
```

generated:
```id
607d21bf2f06142e52d2057de49eed8d
```