# API Documentation

## Introduction
This document provides detailed information on how to use and implement the APIs in the V8 engine.

## Table of Contents
1. [Sign Up](#sign-up)
2. [Log In](#log-in)
3. [API Sign Up](#api-sign-up)
4. [API Log In](#api-log-in)

## Sign Up (Recommended)
- Description: This API allows users to sign up for a new account through the browser.
- Usage: To use this API, follow the steps below:
  1. Step 1: Redirect the user to the sign-up page using the `/signup` route.
  2. Step 2: Fill in the required information and submit the form.
  3. Step 3: A JSON response will be returned with the user's information.
- Payload Example:
  ```JSON
  {
    "status": "success",
    "message": "User created successfully"
  }
  ```

## API 2
- Description: This API provides functionality for ABC operations.
- Usage: To use this API, follow these steps:
  1. Step 1: Import the API module using `require('api2')`.
  2. Step 2: Call the `performABC()` function with the required parameters.
- Example:
  ```javascript
  const api = require('api2');
  
  api.performABC(param1, param2);
  ```

## API 3
- Description: This API offers advanced features for DEF operations.
- Sub-APIs:
  - Sub-API 3.1: Provides additional functionality for DEF operations.
  - Sub-API 3.2: Implements advanced algorithms for DEF operations.

### Sub-API 3.1
- Description: This sub-API extends the functionality of API 3 for DEF operations.
- Usage: To use this sub-API, follow these steps:
  1. Step 1: Import the sub-API module using `require('api3/subapi1')`.
  2. Step 2: Call the `performDEF()` function with the required parameters.
- Example:
  ```javascript
  const subapi = require('api3/subapi1');
  
  subapi.performDEF(param1, param2);
  ```

### Sub-API 3.2
- Description: This sub-API implements advanced algorithms for DEF operations.
- Usage: To use this sub-API, follow these steps:
  1. Step 1: Import the sub-API module using `require('api3/subapi2')`.
  2. Step 2: Call the `performAdvancedDEF()` function with the required parameters.
- Example:
  ```javascript
  const subapi = require('api3/subapi2');
  
  subapi.performAdvancedDEF(param1, param2);
  ```

## API 4
- Description: This API provides utility functions for GHI operations.
- Usage: To use this API, follow these steps:
  1. Step 1: Import the API module using `require('api4')`.
  2. Step 2: Call the desired utility functions provided by the API.
- Example:
  ```javascript
  const api = require('api4');
  
  api.utilityFunction1();
  api.utilityFunction2();
  ```