Authorize a device from a generated device authorization code.
This is the second step in the process of authorizing a device by pin code.
Firstly the device must request a generated authorization code via the
/authorization/device/code endpoint.
This endpoint then authorizes the device associated with the code to sign in to a user account. Typically this endpoint will be called from a page presented in the web app under the account section.
Once authorized, the device will then be able to sign in to that account
via the /authorization/device endpoint, without needing to provide the
credentials of the user.