Android_usb Cannot enable 'adb'

VIM1 Android
9

For VIM_Nougat_170901

ADB over USB

  1. The USB-C cable is connected to my PC.

  2. I enable adb debugging on my device (Vim Pro) : Settings–>Developer options —> USB debugging
    Open a terminal and type:

$ adb shell

Appear error : device unauthorized. Please check the confirmation dialog on you device.