Function create_completion

pub async fn create_completion(
    pool: &Pool<Postgres>,
    channel: &Channel,
    cid: i32,
    uid: i32,
    chat_id: i32,
    params: CreateCompletionParams,
    model: &Model,
    api_key: &str,
    user_agent: &str,
) -> Result<()>

Does the whole chat completion routine.