check_once_cc_remove_cred
check_once_cc_remove_cred(context, ccache, *creds_array[i], CC_NOERROR, "10 ok creds");
check_once_cc_remove_cred(context, ccache, *creds_array[0], CC_NOTFOUND, "removed same creds twice");
check_once_cc_remove_cred(context, ccache, *creds_array[0], CC_NO_EXIST, "invalid ccache");
cc_result check_once_cc_remove_cred(apiCB *context, ccache_p *ccache, cred_union in_creds, cc_int32 expected_err, const char *description);