fix: readme

Signed-off-by: Shruti3004 <mail2shruti.ag@gmail.com>

README.md

@@ -1,21 +1,77 @@
-# Digilocker-SDK
+# Digilocker Package 📁
 
-## Current List of APIs
+## Overview 🚀
 
-1. Login
-2. Get Documents
-3. Upload Documents (WIP)
-4. eSign (WIP)
+The Digilocker Package is a library that simplifies the integration of the Digilocker API into your applications. Digilocker is a platform that allows users to store, access, and share their documents digitally.
 
-## Usage
+## Installation 📦
 
-### Frontend
+You can install the Digilocker Package via npm:
 
-### Backend
+```bash
+npm install digilocker-sdk
+```
 
-### Type Definitions
+## Usage 🧰
 
-See all the types [here](./src/types.ts)
+1. Initialize Digilocker 🛠️
+   To start using the Digilocker functions, you need to create an instance of the Digilocker class and provide the necessary configuration. Here's how to initialize the Digilocker instance:
+
+```js
+import {
+  Digilocker,
+  Config,
+  DigiLockerFunctions,
+} from 'your-digilocker-package-name';
+
+// Configure Digilocker ⚙️
+const digilockerConfig: Config = {
+  clientId: 'yourClientId',
+  clientSecret: 'yourClientSecret',
+  callbackURL: 'yourCallbackURL',
+};
+
+// Create an instance of Digilocker 🚀
+const digilockerInstance: Digilocker = new DigiLockerFunctions(
+  digilockerConfig
+);
+```
+
+2. Generate Login URL 🌐
+   You can generate a login URL that users can click to initiate the Digilocker login process:
+
+```js
+const loginUrl = digilockerInstance.generateLoginUrl();
+// Use this loginUrl in your application to redirect users to the Digilocker login page.
+```
+
+3. Exchange Code for Access Token 🔑
+   After the user logs in and you receive an authorization code, use the following function to exchange the code for an access token:
+
+```js
+const authorizationCode = 'codeReceivedFromDigilocker'; // Replace with the actual code
+await digilockerInstance.exchangeCodeForToken(authorizationCode);
+// The access token is now available in the digilockerInstance.accessToken property.
+```
+
+4. Fetch Issued Files 📂
+
+```js
+try {
+  const issuedFiles = await digilockerInstance.fetchIssuedFiles();
+  console.log('Issued Files:', issuedFiles);
+} catch (error) {
+  console.error('Error fetching issued files:', error);
+}
+```
+
+## Error Handling ❌
+
+Make sure to handle errors and user interactions appropriately in your application based on your specific requirements.
+
+## License 📜
+
+This project is licensed under the MIT License - see the LICENSE.md file for details.
 
 ## References