Pkpass File

Hello, https://developer.apple.com/library/archive/documentation/UserExperience/Conceptual/PassKit_PG/YourFirst.html#//apple_ref/doc/uid/TP40012195-CH2-SW1 I am trying to create a pkpass file according to the document here. I have done all certificates and identifier operations. however, when I run the ./signpass command in terminal, I get error "Couldn't find an identity for pass.com.***.***". Any idea how to solve this issue?