Lineage OS with ADB > NOK

Hi there,

I need to update may Fairphone 4 and for this I vave to use my computer
So I need ADB and FASTBOOT
First time I’ve got pb with this kind of lanipulation

User@xps15:~$ adb devices

User@xps15:~$ adb devices
List of devices attached
e722a099 no permissions (missing udev rules? user is in the plugdev group); see [Run apps on a hardware device  |  Android Studio  |  Android Developers]

Thanks a lot and in advance for helping me ;o)

DELL portable = XPS15
Version DEBIAN = 12
Version LineageOS = 20
Tél. Fairphone 4