Lab 5.1 - curl XPOST has error of "the server does not allow this method on the requested resource"

Hi I can run the "curl --cert ./client.pem --key ./client-key.pem -cacert ./ca.pem https://:6443/api/v1/pods" GET command, but not the XPOST command, it shows a 405 error code with "the server does not allow this method on the requested resource", how can I solve the problem? Thanks!