Adding hashed account ID to requests to fix bad request responses

[kristofvloock]

For me, the integration didn't work as the API now requires the hashed account ID to be send with the other request. This PR adds this functionality by obtaining and hashing the account ID from the login request, when the Bearer token is also obtained. I also bumped the version, because with 4.9 the API responds that it doesn't support that version any longer.

[Mnementh]

Need to update the VERSION to 4.16.0

And hopefully we can get a merge

[awtx-jeffjohnson]

Can this be merged back into Main and a new version released?

[LingTheBug]

The version might need updated, my own testing shows a response saying v 4.16.0 minimum now Error, status code: 403, Text:{"data":{"minimumVersion":"4.16.0"},"status":920}

[LingTheBug]

Added PR #59 to update minimum version required