fix(client): use the http client from the config when fetching the access token

[lol3909]

Description

Use the HTTP client from the configuration instead of using a brand new HTTP client.

I'm proposing this fix because in my code, I change the transport object in my unit test when I need to mock it. That works well except for this call that doesn't take the configured HTTP Client into consideration. Also, it is a common pattern in Go to let the user of a library overwrite the HTTP Client, so I don't see why we couldn't use it here too.

Also, I added to the make file all of the API versions that need to be built; I'm not sure why they weren't all there. Maybe I'm missing some context for that. Feel free to correct me 😁

This is my first time contributing to this repo. If I missed something, feel free to correct. Hope this fix helps!

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[CLAassistant]

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