Finally I have managed to get automatic refreshing of tokens to MyTesla to work in ABRP. In plain English this means that once you are logged in to MyTesla in ABRP, you should never have to log in again – it should not expire.
Note that ABRP still does not store your password or MyTesla email anywhere. Only a temporary key from Tesla, called a token, is stored locally in your browser. Never on our servers. The refresh is done using Teslas refresh token, which is issued when logging in the first time. You can of course log out manually any time you like.