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import { Client } from "https://deno.land/x/postgres/mod.ts";
export class Database {  client: Client;  constructor() {    this.client = new Client({      user: "postgres",      database: "users",      hostname: "localhost",      port: 5432,    });  }  async query(sql: string): Promise<{ rows: any[] }> {    await this.client.connect();    const result = await this.client.query(sql);    await this.client.end();    return result;  }}