# Introduction
Avoid having multiple `isDefined` definition across our pacakges
Also avoid importing `isDefined` from `twenty-ui` which exposes a huge
barrel for a such little util function
## In a nutshell
Removed own `isDefined.ts` definition from `twenty-ui` `twenty-front`
and `twenty-server` to move it to `twenty-shared`.
Updated imports for each packages, and added explicit dependencies to
`twenty-shared` if not already in place
Related PR https://github.com/twentyhq/twenty/pull/9941
In this PR:
- refactoring auth module to extract a jwt module that can be re-used
from other part of the app (avoiding circular dependencies file module
=> auth => file (file and auth both need jwt actually)
- activating imageIdentfier on person on workspace creation (this will
put back the images on people)
- fixing picture upload (we were missing some fileToken)
