RFC: pass company code into config

[skukx]

There are certain endpoints which company code gets passed as a parameter into the calling function.

Should we instead pass company code into the initialization of the client so that it doesn't need to be passed into other methods.

This makes a subtle change that a single client cannot act on multiple company codes, and a new client would need to be instantiated for each company code.

I somewhat doubt this affects many if any at all.