Combine Resource and Resources using class methods.

[tdstein]

It's possible to combine the Resource and Resources classes into a single class by refactoring all existing Resources methods as @classmethod implementations. This change requires defining session and url as class variables, which impacts the architecture of the Client class. Currently, these are instance variables, which are set on object initialization. This ensures that multiple clients can be defined for different Connect servers. Class variables, on the other hand, are scoped to the class, not the instance. Therefore, each client must define separate classes at runtime to ensure that the resources used by the client are scoped to the proper Connect server. Here is a simple example showing how to define classes at runtime with different instance variables: https://gist.github.com/tdstein/f8326a7f63562652a98ca7958c31f813

[tdstein]

After further exploration, we discovered that this pattern introduces too many oddities. Foremost is handling multiple Client instances correctly. Using class variables to manage the url and session instances becomes overly complex.