Could not return device to the STF. Status: 403

[akamarouski]

When running automation we got such error when grid tries to return reserved device to the STF:
Could not return device to the STF. Status: 403. At the same moment we got Could not disconnect 'remoteConnect'. error. This error appears with different android and iOS devices.
Visually they were disconnected in STF for a certain period of time.

These endpoints need to be tested under high load for a long time.

[ignacionar]

The response with 403 status will be returned if:

1. The device is not being used/controlled in STF by the user
2. The submitted token does not belong from the user controlling the device or from an Admin. user

It could be good to check if a user is using the device first, if this request returns 403, there's no user controlling the device:

curl -H "Authorization: Bearer <adminUser-token>" -H 'Content-Type: application/json' <stf-url>/api/v1/users/devices/{serial}