You can authenticate yourself with a generated token that is valid until revocation.
How to generate tokens
If it is enabled by the Administrator, each user can generate tokens for themselves:
Navigate to the "My Preferences" page within Timetracker and switch to the "REST API" tab.
Provide a name for the new token to help you identify it in the future, and then click the "+" button to create it.
Copy the newly created token presented in the dialog. Please note that the token will not be displayed again in the future, so if you lose it, you will need to create another one.
Ensure that you keep your API Tokens secure, just as you would with your passwords. They are used for authentication, and if someone else gains access to your token, they can act on your behalf within Timetracker.