> For the complete documentation index, see [llms.txt](https://olddocs.exivity.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://olddocs.exivity.io/security/authentication/token.md).
# Token
## Authentication tokens
API tokens use the widely used JWT encoding format, and we take extra measures to harden the tokens:
* Configurable lifetime (defaults to 4 hours)
* Configurable storage policy (defaults to session storage)
* Revoked at logout
* Invalidate all user tokens on request
* Client fingerprinting
## Change the lifetime of a token
By changing the lifetime of a token, users will be logged out after their token expires.\
\
Follow these instructions to change the lifetime of the token:
1. Navigate to the [Settings](/administration/settings.md) page under the **Administrations** > **Settings** menu.
2. Select the **System** tab and scroll down to the *Security* section.
3. Choose the desired token lifetime from the dropdown menu:
4\. Click the **Update** button to apply the change.
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