About refresh tokens
Instead of communicating with Tesla using your email or password, Tessie uses a refresh token, which is more secure.
A refresh token is a long string of randomized characters. They are part of the OAuth standard, which is the standardized account linking protocol on the internet.
When you sign in with Tesla, Tesla provides Tessie a refresh token automatically.
Generating a token
You can easily generate a refresh token yourself using the Tesla Access Token Generator Chrome extension, the Tesla Tokens Android app or Auth app for Tesla on iOS. These are independently maintained projects and Tessie has no affiliation with them.