You can place the bearer access_token for a specific user into the Authentication section of this documentation 👉.

Cancel a transfer for a user. To cancel a transfer, you must provide the ID of the transfer in the Endpoint URL. When a transfer is successfully canceled, Astra will return a successful response (HTTP 200) and the status of the transfer in the Transfer table will update to `canceled``.

Transfers can only be canceled if the request is made before the 5p ET / 2p PT cutoff on the first banking day after the Transfer was initiated, as defined by ACH regulations. Transfers cannot be canceled after that cutoff.