Allow for an additional instance to support a second Leaf

[2lingPa]

Checklist

• [X] I have filled out the template to the best of my ability.
• [X] This only contains 1 feature request (if you have multiple feature requests, open one feature request for each feature request).
• [X] This issue is not a duplicate feature request of previous feature requests.

Is your feature request related to a problem? Please describe.

The current integration supports one car, it cannot be loaded twice.

Describe the solution you'd like

As we as a family own two Leafs I would like to propose to enable the integration to be loaded twice.

Describe alternatives you've considered

I realize myself this is a luxury problem and I have no idea of the work involved but nothing ventured, nothing gained. If there is something I can do to help e.g. test with two cars, please let me know.

Additional context

No additional context.