Sequelize does not return a model object. How to fix?

Question

PostgreSQL

Made a small project on Sequelize/Express with html/css interface, it worked on bare SQL queries. I tried to do it right away on the models, but my request (findAll(), console.log) returned an empty object. SELECT related functions didn't work either. Now I want to try again. Actually made models, arranged connections. But sequelize did not return an object to me, and does not return it. Either the name of the model or an empty object is returned instead. What have I done wrong ?

https://github.com/zeromask1337/ranepadb

Database dump link:
https://drive.google.com/file/d/1EfBtn63SdF_2X8Cun...

const { DataTypes } = require("sequelize");
const db = require("../config/database");

const Office = db.define(
    "Office",
    {
        id: {
            type: DataTypes.INTEGER,
            allowNull: false,
            primaryKey: true,
            autoIncrement: true,
        },
        address: DataTypes.STRING(45),
    },
    {
        // Other model options go here
        tableName: "office",
        timestamps: false,
    }
);

const Employees = db.define(
    "Employees",
    {
        id: {
            type: DataTypes.INTEGER,
            allowNull: false,
            primaryKey: true,
            autoIncrement: true,
        },
        name: DataTypes.STRING(45),
        job: DataTypes.STRING(45),
        reg_date: DataTypes.DATEONLY,
        salary: DataTypes.DECIMAL(10, 2),
        weekend: DataTypes.INTEGER,
        office_id: { type: DataTypes.INTEGER, allowNull: false },
    },
    {
        // Other model options go here
        tableName: "employees",
        timestamps: false,
    }
);

// Employees.hasOne(Office, { foreignKey: "office_id" });
Office.belongsTo(Employees, { foreignKey: "office_id" }); // Foreign key

const Developer = db.define(
    "Developer",
    {
        id: {
            type: DataTypes.INTEGER,
            allowNull: false,
            primaryKey: true,
            autoIncrement: true,
        },
        role: DataTypes.STRING(45),
        level: DataTypes.STRING(45),
        project_count: DataTypes.INTEGER,
    },
    {
        // Other model options go here
        tableName: "developer",
        timestamps: false,
    }
);

Developer.belongsTo(Employees, { foreignKey: "id" }); // Foreign key

const Clients = db.define(
    "Clients",
    {
        id: {
            type: DataTypes.INTEGER,
            allowNull: false,
            primaryKey: true,
            autoIncrement: true,
        },
        name: DataTypes.STRING(45),
        total_sum: DataTypes.DECIMAL(20, 2),
    },
    {
        // Other model options go here
        tableName: "clients",
        timestamps: false,
    }
);

const Projects = db.define(
    "Projects",
    {
        id: {
            type: DataTypes.INTEGER,
            allowNull: false,
            primaryKey: true,
            autoIncrement: true,
        },
        price: DataTypes.DECIMAL(15, 2),
        started: DataTypes.DATEONLY,
        ended: DataTypes.DATEONLY,
        teamlead_id: { type: DataTypes.INTEGER, allowNull: false },
        designer_id: { type: DataTypes.INTEGER, allowNull: false },
        programmer_id: { type: DataTypes.INTEGER, allowNull: false },
        dbarch_id: { type: DataTypes.INTEGER, allowNull: false },
        client_id: { type: DataTypes.INTEGER, allowNull: false },
    },
    {
        // Other model options go here
        tableName: "projects",
        timestamps: false,
    }
);

Projects.hasOne(Developer, { foreignKey: "teamlead_id" }); // Foreign key
Projects.hasOne(Developer, { foreignKey: "designer_id" }); // Foreign key
Projects.hasOne(Developer, { foreignKey: "programmer_id" }); // Foreign key
Projects.hasOne(Developer, { foreignKey: "dbarch_id" }); // Foreign key
Projects.hasOne(Clients, { foreignKey: "client_id" }); // Foreign key

module.exports = { Clients, Developer, Employees, Office, Projects };

require("dotenv").config();
const {
    Clients,
    Developer,
    Employees,
    Office,
    Projects,
} = require("./models/models");
const express = require("express");
const app = require("./req/requests");

//Database
const db = require("./config/database");

//Connecting to database
db.authenticate()
    .then(() => console.log("Database connected..."))
    .catch((err) => console.log("Error: " + err));

//Synchronize models
db.sync().then(console.log("Synced"));

//Express
app.use(express.static("public"));
app.listen(process.env.PORT, () =>
    console.log(`Server started on port ${process.env.PORT}...`)
);

const offices = Office.findAll();
console.log("All offices:", JSON.stringify(offices, null, 2));