Rename it to connectwise-sdk-php to make it clear that this is a PHP client to the connectwise API.
Consider using the word "experimental" and/or "unsupported" instead of "unofficial". It does not make sense for a company to publish an "unofficial" derivative of one of its own products.
Update the README.md to refelect these changes as well.
Based on https://github.com/LabTechSoftware/ConnectWisePSA-SDK/issues/2 it's clear that at least some downstream users (internal or external, doesn't matter) are confused by the existence of this repo.
Some suggestions:
connectwise-sdk-php
to make it clear that this is a PHP client to the connectwise API.Also: the acronym "PSA" should not be used in any CW material :)