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You can probably use:

os.environ.get('USERNAME') 

or

os.environ.get('USER') 

But it's not going to be safe because environment variables can be changed.

Windows:

os.environ.get('USERNAME') 

Linux:

os.environ.get('USER') 

Both:

os.environ.get('USER', os.environ.get('USERNAME')) 

Note that environment variables can be modified by the user, so this is a potential security vulnerability. With this method, an attacker can easily fake their username.

You can probably use:

os.environ.get('USERNAME') 

But it's not going to be safe because environment variables can be changed.

You can probably use:

os.environ.get('USERNAME') 

or

os.environ.get('USER') 

But it's not going to be safe because environment variables can be changed.

You can probably use:

os.getenv('USERNAME') 

But it's not going to be safe because environment variables can be changed.

You can probably use:

os.environ.get('USERNAME') 

But it's not going to be safe because environment variables can be changed.