如何使用Mongoc创建TTL索引(mongo C lib)

#include <bson/bson.h>
#include <mongoc/mongoc.h>

int main() {
    mongoc_client_t *client;
    mongoc_database_t *database;
    mongoc_collection_t *collection;
    bson_t *keys;
    bson_t *options;
    bson_error_t error;

    mongoc_init();

    client = mongoc_client_new("mongodb://localhost:27017");
    database = mongoc_client_get_database(client, "mydb");
    collection = mongoc_database_get_collection(database, "mycollection");

    keys = BCON_NEW("expireAfterSeconds", BCON_INT32(0));
    options = BCON_NEW("expireAfterSeconds", BCON_INT32(3600));

    if (!mongoc_collection_create_index(collection, keys, options, &error)) {
        fprintf(stderr, "Failed to create TTL index: %s\n", error.message);
    }

    bson_destroy(keys);
    bson_destroy(options);

    mongoc_collection_destroy(collection);
    mongoc_database_destroy(database);
    mongoc_client_destroy(client);

    mongoc_cleanup();

    return 0;
}