kg_cred_time_to_refresh
if (cred->expire == 0 || kg_cred_time_to_refresh(context, cred)) {
kg_cred_time_to_refresh(krb5_context context, krb5_gss_cred_id_rec *cred);
if (cred->expire == 0 || kg_cred_time_to_refresh(ctx->k5c, cred)) {