I am working on building an automated pipeline with a disk that contains a LUKS partition.  since it is running automated i need a method to provide the LUKS key using a file but i keep getting prompted to enter the keys.  I am creating a file with only the key stored in it and using the --key option but i still get the key prompt.

here is the command that i am running, can you advise me on what i need to change?: