HTTPClient interface

[Ishrock]

Python version: 3.7.2
Library version: 2.0.0

HTTPClient:
Interface between requests (line 140), pycurl (line 57), and urllib (line 196) should be the same. 'Requests' has xapikey as a parameter while pycurl, and urllib do not.

[AlexandrosMor]

Hello @Ishrock,

We are going to investigate this issue and we will keep you updated ,

Kind regards,
Alexandros Moraitis
Adyen

[Ishrock]

Opened a pull request for the issue: #68

[Ishrock]

closing, pr # 68 fixes issue