Some questions in normal installation

[00Kai0]

@leportella
When I install this module (not develop install), I find some questions.
1.
After pip install ., I use from nativeauthenticator import NativeAuthenticator.It shows some error

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/kai/work/embark3_env/venv/lib/python3.5/site-packages/nativeauthenticator/__init__.py", line 4, in <module>
    from nativeauthenticator.nativeauthenticator import NativeAuthenticator
  File "/home/kai/work/embark3_env/venv/lib/python3.5/site-packages/nativeauthenticator/nativeauthenticator.py", line 1, in <module>
    import bcrypt
ImportError: No module named 'bcrypt'

I saw you put bcrypt into dev-requirements.txt, I think you should put it into setup.py's install_requires. (It just my suggestions).
2.
It's about f-string.

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/kai/work/embark3_env/venv/lib/python3.5/site-packages/nativeauthenticator/__init__.py", line 4, in <module>
    from nativeauthenticator.nativeauthenticator import NativeAuthenticator
  File "/home/kai/work/embark3_env/venv/lib/python3.5/site-packages/nativeauthenticator/nativeauthenticator.py", line 10, in <module>
    from .handlers import (AuthorizationHandler, ChangeAuthorizationHandler,
  File "/home/kai/work/embark3_env/venv/lib/python3.5/site-packages/nativeauthenticator/handlers.py", line 53
    f"at least {pw_len} characters, doesn't have "
    ^
SyntaxError: invalid syntax

This is a new string format in python3.6 (I usually use python3.5). If you just want to support python>=3.6, you need set python_requires=">=3.6" in setup.py. The other way is changing the format style to support 3.4 or 3.5.
This is all my questions. Thank you.
If you wanne help, I can have a try.

[leportella]

@00Kai0 thanks for your feedback! I'll remove the f-string to assure backward compability and will add bcrypt as a dependency as well!