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Refreshing the client token by backend modules making the request (seems like the best approach).
Drawbacks: Right after the start of the import, a new AT+RT pair needs to be obtained to avoid situations where the RT is invalidated due to the user logging out or obtaining a new token.Obtaining a #SYS Token that does not expire: (Refer to comment). The ticket linked to this comment is currently in the OPEN state, so it's uncertain how well this approach works.
Drawbacks: The data import process relies on user permissions, which is why a client token is required.Handling this token at the gateway:
Drawbacks: The gateway must recognize the token used to start the data import (DI) as special and allow requests from data import with the old AT+RT pair.