This article explains how to delete vehicle from HU-GO account, on client's side.
Client has to do this, if we are trying to activate HU-GO via Jenkins/Postman (https://my.ruptela.com/hc/en-us/articles/5287445088541-How-to-enable-HU-GO-functionality-for-a-client) and get {\"error\":\"unauthorized: device_id\"}"}
Login to Hu-Go account at https://www.hu-go.hu/articles/category/news
click on "Vehicles attached to this account".
Search for plate number and click delete:
Now go to "vehicles attached to all acounts"
And repeat the process:
After this vehicle should be deleted successfully and we should be able to activate it.
If this does not help - please consult with Global support.