Fails to load email provider in docker container

[tsudmi]

Describe the bug
Hi,

The library requires a user to be created in a container, otherwise, it will fail with the following error on load:

  File "/application/main.py", line 4, in <module>
    from notifiers import get_notifier
  File "/pyroot/lib/python3.7/site-packages/notifiers/__init__.py", line 2, in <module>
    from .core import *
  File "/pyroot/lib/python3.7/site-packages/notifiers/core.py", line 331, in <module>
    from .providers import _all_providers
  File "/pyroot/lib/python3.7/site-packages/notifiers/providers/__init__.py", line 1, in <module>
    from . import (
  File "/pyroot/lib/python3.7/site-packages/notifiers/providers/email.py", line 15, in <module>
    DEFAULT_FROM = f"{getpass.getuser()}@{socket.getfqdn()}"
  File "/usr/local/lib/python3.7/getpass.py", line 169, in getuser
    return pwd.getpwuid(os.getuid())[0]
KeyError: 'getpwuid(): uid not found: 1001'

Expected behavior
It would be nice to be able to use the library without creating the user.

Additional context
Python version: 3.7.5
Docker image: python:3.7.5-alpine3.10

[welcome]

Thanks for opening your first issue here! Be sure to follow the issue template! 👋🐞👋

[liiight]

Thanks for this! Should be an easy fix, I'll jus change the default in case there's no user.

[amansinghvi41]

When 1.2.2 will be released ? I am also facing KeyError: 'getpwuid(): uid not found error.

[amansinghvi41]

@tsudmi
Use any of these env variable.
'LOGNAME', 'USER', 'LNAME', 'USERNAME'

getuser() will fetch username from these env variables firsts then it will check with pwd.getpwuid(os.getuid())[0].