import { Options, Sequelize } from 'sequelize';
/**
 * Setups the PostgreSQL connection.
 * @env PGHOST PostgreSQL Host
 * @env PGPORT PostgreSQL Port
 * @env PGUSER PostgreSQL User
 * @env PGPASSWORD PostgreSQL Password
 * @env PGDATABASE PostgreSQL Database
 * @returns The default connection of the sequelize module.
 */
export declare function dbConnFactory(debug?: boolean, opts?: Pick<Options, 'logging'>): Sequelize;