def __init__(self, api_key):
<EOL>self.ApiResourceMixin.set_api_key(api_key)<EOL>self.products = self.ProductsResource()<EOL>self.quote = self.QuoteResource()<EOL>self.status = self.StatusResource()<EOL>self.webhooks = self.WebhooksResource()<EOL>
Initializes the ShirtsIOClient object, creating the ShirtsIORequest
object which deals with all request formatting.

:param api_key: a string, the user specific secret, received
                     from the /access_token endpoint

:returns: None