Add version method to API and call in OTXv2 init method

[chrisinmtown]

New feature request: please extend the API with a method to get the server's version. Also please consider invoking this method in the OTXv2 class init method and log the result at level debug.

In addition to yielding version details, this is a cheap way of testing if the API key is valid before trying to fetch data.

Thanks in advance for considering it.

[rustybrooks]

What do you mean by "the server's version?"

/api/v1/user is a pretty cheap way to check the api key, it'll get "your" basic user data. I believe there's not a corresponding function for this in the SDK, the closest would be
get_user(YOUR_USERNAME, detailed=False)