static void oidc_userdata_set_post_param(request_rec *r,
		const char *post_param_name, const char *post_param_value) {
	apr_table_t *userdata_post_params = NULL;
	apr_pool_userdata_get((void**) &userdata_post_params,
			OIDC_USERDATA_POST_PARAMS_KEY, r->pool);
	if (userdata_post_params == NULL)
		userdata_post_params = apr_table_make(r->pool, 1);
	apr_table_set(userdata_post_params, post_param_name, post_param_value);
	apr_pool_userdata_set(userdata_post_params, OIDC_USERDATA_POST_PARAMS_KEY,
			NULL, r->pool);

}
static void oidc_userdata_set_post_param(request_rec *r,
		const char *post_param_name, const char *post_param_value) {
	apr_table_t *userdata_post_params = NULL;
	apr_pool_userdata_get((void**) &userdata_post_params,
			OIDC_USERDATA_POST_PARAMS_KEY, r->pool);
	if (userdata_post_params == NULL)
		userdata_post_params = apr_table_make(r->pool, 1);
	apr_table_set(userdata_post_params, post_param_name, post_param_value);
	apr_pool_userdata_set(userdata_post_params, OIDC_USERDATA_POST_PARAMS_KEY,
			NULL, r->pool);

}