Used by activity workers and task states using the callback pattern to report that the task identified by the taskToken
failed.
See https://www.paws-r-sdk.com/docs/sfn_send_task_failure/ for full documentation.
sfn_send_task_failure(taskToken, error = NULL, cause = NULL)
[required] The token that represents this task. Task tokens are generated by Step Functions when tasks are assigned to a worker, or in the context object when a workflow enters a task state. See GetActivityTaskOutput$taskToken.
The error code of the failure.
A more detailed explanation of the cause of the failure.