Make EResult (or the full response) accessible in SteamAuthenticatorError.

[luckydonald]

So current situation is that stuff like SteamAuthenticator(…).add() can cause SteamAuthenticatorError.

For example,

Traceback (most recent call last):
…
steam.guard.SteamAuthenticatorError: Failed to add authenticator. Error: <EResult.DuplicateRequest: 29>

Now that's a pretty easy to catch that error, telling the user to first have it log off the old instance, hence duplicate.
Just, we can't really distinguish those errors unless we do some ugly string stuff on that returned string.

# "Failed to add authenticator. Error: <EResult.DuplicateRequest: 29>"
if str(e).startswith("Failed to add authenticator. Error: <EResult."):
  error_string = str(e)[45:-1]  # "DuplicateRequest: 29"
  error_label, error_num = error_string.split(": ")
  from steam.enums import EResult
  error_label = EResult[error_label]
  error_num = EResult(int(error_num))
  if error_label == error_num:
    error = error_label
  # end if
  if error == EResult.DuplicateRequest:
    exit('Already have set an authenticator in another app')
  # end if
# end if

This is obviously super prone to issues due to changes there, it would be way better to just include those fields in the exception.

[rossengeorgiev]

That's a good point.

steam/steam/guard.py

Lines 469 to 470 in 061ca33

	class SteamAuthenticatorError(Exception):
	pass

SteamAuthenticatorError should really inherit from steam.exceptions.SteamError. And then any places where it sets the eresult should be passed as parameter. This looks like a straightforward change

[luckydonald]

I can see if I have time to do a PR

[luckydonald]

Made one.