Update README

README.md

@@ -1,3 +1,65 @@
 # OTP Generator & Validator
 
 ![Github License](https://img.shields.io/github/license/bonabrian/laravel-otp?style=for-the-badge)
+
+## Installation
+
+Via Composer
+
+```bash
+composer require bonabrian/laravel-otp
+```
+
+To publish the config file for laravel
+
+```bash
+php artisan otp:publish
+```
+
+## Usage in Laravel
+
+Import the facade class
+```php
+use Bonabrian\Otp\Facades\Otp;
+```
+
+**Generate an OTP:**
+
+```php
+$code = Otp::generate($secret);
+```
+
+The generated OTP above will only be validated using the same secret within the default expiry time.
+
+> **TIP:** OTP is generally used for verification. So the easiest way of determining the `secret` is the user's email/username or phone number or maybe user ID.
+
+**Validate an OTP:**
+
+```php
+$valid = Otp::validate($code, $secret);
+```
+
+**Other Generate & Validate options:**
+
+```php
+// Generate
+Otp::setDigits(4)->generate($secret); // 4 Digits
+Otp::setExpiry(30)->generate($secret); // 30 min expiry
+Otp::setDigits(4)->setExpiry(30)->generate($secret); // 4 Digits, 30 min expiry
+```
+
+Make sure to set the same config during validating.
+Example:
+
+```php
+// Example 1
+Otp::validate($code, $secret); // false
+Otp::setDigits(4)->validate($code, $secret); // true
+
+// Example 2
+Otp::validate($code, $secret); // false
+Otp::setExpiry(30)->validate($codde, $secret); // true
+
+// Example 3
+Otp::validate($code, $secret); // false
+Otp::setDigits(4)->setExpiry(30)->validate($code, $secret); // true