Failing Registration prodecure

[Arfius]

Hello,
I got the following error during the registration procedure.

u.register(username, password)
File "/site-packages/pycognito/init.py", line 350, in register
self._add_secret_hash(params, "SecretHash")
File "/site-packages/pycognito/init.py", line 695, in _add_secret_hash
secret_hash = AWSSRP.get_secret_hash(
File "site-packages/pycognito/aws_srp.py", line 201, in get_secret_hash
message = bytearray(username + client_id, "utf-8")
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

The username has None value in get_secret_hash because the attribute passed via registrer function is not updating the self.username .
To use the register procedure , i am passing the attribute username to the Cognito object, but this is not described in the documentation.

[nk9]

There are really quite a few of these "var vs self.var" gotchas, @pvizeli. Is it worth re-evaluating where these variables are passed in vs consulting self and trying the normalize the way the library deals with them?

[nk9]

Also, this seems to be a duplicate of #17

[pvizeli]

There are really quite a few of these "var vs self.var" gotchas, @pvizeli. Is it worth re-evaluating where these variables are passed in vs consulting self and trying the normalize the way the library deals with them?

I'm open for suggestion.