I did write a simple Windows (desktop) app called TeslaTokenGenerator, for those who wanted to create authentication tokens for their Tesla, and use with 3rd party apps/data loggers.
TeslaTokenGenerator can also create a cURL script for you to use, if you prefer not wanting to install anything. It is easy to find this online, but some of you have pinged me to get more details on this. So, I have the script below that you can use. Once you copy this, you will need to update your Tesla account login details (email and password) and run it in a console (command line) and it will all the same API’s to create the token, which then you can save.
curl -X POST -H "Cache-Control: no-cache" -H "Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW" -F "grant_type=password" -F "client_id=81527cff06843c8634fdc09e8ac0abefb46ac849f38fe1e431c2ef2106796384" -F "client_secret=c7257eb71a564034f9419ee651c7d0e5f7aa6bfbd18bafb5c5c033b093bb2fa3" -F "email=YOUR-TESLA-LOGIN-EMAIL@SOMEWHERE.COM" -F "password=YOUR-TESLA-ACCOUNT-PASSWORD" "https://owner-api.teslamotors.com/oauth/token"
You can see the screenshots of this below too – one in Windows, and another in Linux (well Bash on Windows, but it is real Linux).