CC_CRED_MAX
check_once_cc_get_NC_info(context, "", "", CC_CRED_MAX, 0, CC_NOERROR, "iterating over an empty collection");
err = check_once_cc_create(context, "name", CC_CRED_MAX, "foo@BAR.ORG", &ccache, CC_ERR_CRED_VERSION, "invalid creds_vers"); // invalid creds_vers
check_once_cc_set_principal(context, ccache, CC_CRED_MAX, "foo/BAZ@BAR.ORG", CC_ERR_CRED_VERSION, "CC_CRED_MAX (not allowed)");