As far as I am aware, this process only works in the EU.
Click on HACS on the left panel.
Click the 3 stacked dots and select Custom repositories.
For Repository enter https://github.com/dan-r/HomeAssistant-NissanConnect. For Category select Integration and click ADD.
The repository will now show. Click on it.
Click DOWNLOAD in the lower right.
Click DOWNLOAD
Click Settings.
Click on Restart required.
Click SUBMIT.
Enter your Email Address and Password that you use to login into Nissan.
Assign an Area and click FINISH.
To check that it is working click on Overview in the left panel.
In the Area that you assigned you should see a listing of Leaf values.
Congratulations, you have now added your Leaf. There are so many dashboards and automations you can create from these values.
Darren burnett 