Do I need the PG package in this case?

import { Sequelize } from "sequelize-typescript";
import { Users } from "../models/Users";
import { Links } from "../models/LinksModel";

class Database {
  public sequelize: Sequelize | undefined;

  private POSTGRES_DB = process.env.POSTGRES_DATABASE as string;
  private POSTGRES_HOST = process.env.POSTGRES_HOST as string;
  private POSTGRES_PORT = process.env.POSTGRES_PORT as unknown as number;
  private POSTGRES_USER = process.env.POSTGRES_USER as string;
  private POSTGRES_PASSWORD = process.env.POSTGRES_PASSWORD as string;

  constructor() {
    this.connectToPostgreSQL();
  }

  private async connectToPostgreSQL() {
    this.sequelize = new Sequelize({
      database: this.POSTGRES_DB,
      username: this.POSTGRES_USER,
      password: this.POSTGRES_PASSWORD,
      host: this.POSTGRES_HOST,
      port: this.POSTGRES_PORT,
      dialect: "postgres",
      models:[Links, Users]
    });

    await this.sequelize
      .authenticate()
      .then(() => {
        console.log(
          "✅ PostgreSQL Connection has been established successfully."
        );
      })
      .catch((err: any) => {
        console.log("❌ Unable to connect to the PostgreSQL database:", err);
      });
  }
}

export default Database;

import { Sequelize } from "sequelize-typescript";
import { Users } from "../models/Users";
import { Links } from "../models/LinksModel";

class Database {
  public sequelize: Sequelize | undefined;

  private POSTGRES_DB = process.env.POSTGRES_DATABASE as string;
  private POSTGRES_HOST = process.env.POSTGRES_HOST as string;
  private POSTGRES_PORT = process.env.POSTGRES_PORT as unknown as number;
  private POSTGRES_USER = process.env.POSTGRES_USER as string;
  private POSTGRES_PASSWORD = process.env.POSTGRES_PASSWORD as string;

  constructor() {
    this.connectToPostgreSQL();
  }

  private async connectToPostgreSQL() {
    this.sequelize = new Sequelize({
      database: this.POSTGRES_DB,
      username: this.POSTGRES_USER,
      password: this.POSTGRES_PASSWORD,
      host: this.POSTGRES_HOST,
      port: this.POSTGRES_PORT,
      dialect: "postgres",
      models:[Links, Users]
    });

    await this.sequelize
      .authenticate()
      .then(() => {
        console.log(
          "✅ PostgreSQL Connection has been established successfully."
        );
      })
      .catch((err: any) => {
        console.log("❌ Unable to connect to the PostgreSQL database:", err);
      });
  }
}

export default Database;

  // add database sync
  protected databaseSync (): void {
    const db = new Database()
    db.sequelize?.sync()
  }

  // add database sync
  protected databaseSync (): void {
    const db = new Database()
    db.sequelize?.sync()
  }