diff --git a/config.sh b/config.sh
index ece8d8a..61f9e33 100755
--- a/config.sh
+++ b/config.sh
@@ -1,20 +1,31 @@
-#!/usr/bin/env bash
+#!/bin/bash
 
-# Author: Eshan Roy <m.eshanized@gmail.com>
-# Description: This script configures GitHub user email and username.
+# Author: Eshan Roy <eshan@snigdhaos.org>
+# Author URI: https://eshanized.github.io
 
 set -e
 
-# Function to display usage
+# Function to display usage instructions
 usage() {
-    echo "Usage: ${0##*/} [--email <email>] [--username <username>] [-h]"
-    echo "    --email <email>       Set the GitHub user email."
-    echo "    --username <username> Set the GitHub username."
-    echo "    -h                    Display this help message."
+    cat <<EOF
+Usage: ${0##*/} [--email <email>] [--username <username>] [-h]
+
+Options:
+   --email <email>            Set the GitHub user email.
+   --username <username>      Set the GitHub username.
+   -h, --help                 Display this help message.
+
+Description:
+   This script configures your GitHub user.email and user.name settings globally.
+   If no arguments are provided, it will prompt for input interactively.
+
+Examples:
+   ${0##*/} --email user@example.com --username "Eshan Roy"
+EOF
     exit 1
 }
 
-# Parse command line arguments
+# Parse command-line arguments
 while [[ "$#" -gt 0 ]]; do
     case "$1" in
         --email)
@@ -29,27 +40,42 @@ while [[ "$#" -gt 0 ]]; do
             usage
             ;;
         *)
-            echo "Unknown parameter passed: $1"
+            echo "Unknown argument: $1"
             usage
             ;;
     esac
 done
 
 # Prompt for email if not provided
-if [ -z "$EMAIL" ]; then
-    read -p "Enter your GitHub email: " EMAIL
+if [[ -z "${EMAIL:-}" ]]; then
+    read -p "Enter your GitHub Email: " EMAIL
 fi
 
 # Prompt for username if not provided
-if [ -z "$USERNAME" ]; then
-    read -p "Enter your GitHub username: " USERNAME
+if [[ -z "${USERNAME:-}" ]]; then
+    read -p "Enter your GitHub Username: " USERNAME
 fi
 
-# Set the Git configuration
+# Validate email format
+if ! [[ "$EMAIL" =~ ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ ]]; then
+    echo "Error: Invalid email format: $EMAIL"
+    exit 1
+fi
+
+# Validate username (allowing alphanumerics, dashes, underscores, and dots)
+if ! [[ "$USERNAME" =~ ^[a-zA-Z0-9._-]+$ ]]; then
+    echo "Error: Invalid username format: $USERNAME"
+    exit 1
+fi
+
+# Configure GitHub global settings
 git config --global user.email "$EMAIL"
 git config --global user.name "$USERNAME"
 
-# Confirmation message
-echo "GitHub configuration updated:"
-echo "  User Email: $EMAIL"
-echo "  Username: $USERNAME"
\ No newline at end of file
+# Display success message
+echo -e "\033[1;32mGitHub configuration setup successful!\033[0m"
+echo "  User Email:    $EMAIL"
+echo "  Username:      $USERNAME"
+echo -e "\033[1;36mYou can verify this configuration using the following commands:\033[0m"
+echo "  git config --global user.email"
+echo "  git config --global user.name"
\ No newline at end of file