You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/OctoBase/libs/jwst-storage/src
    
    the code of the file until where you have to start completion: #[forbid(unsafe_code)]
mod entities;
mod rate_limiter;
mod storage;
mod types;

use std::{path::PathBuf, sync::Arc, time::Duration};

use async_trait::async_trait;
use chrono::Utc;
use futures::{Future, Stream};
use jwst_core::{DocStorage, JwstResult, Workspace};
use jwst_logger::{debug, error, info, trace, warn};
use path_ext::PathExt;
use rate_limiter::{get_bucket,
    
async fn create_connection(database: &str, single_thread: bool) -> JwstStorageResult<DatabaseConnection> {
    let connection = Database::connect(
        ConnectOptions::from(database)
            .max_connections(if single_thread { 1 } else { 50 })
            .min_connections(if single_thread { 1 } else { 10 })
            .acquire_timeout(Duration::from_secs(5))
            .connect_timeout(Duration::from_secs(5))
            .idle_timeout(Duration::from_secs(5))
            .max_lifetime(Duration::from_secs(30))
            .to_owned(),
    )
    .await?;

    Ok(connection)
}