diff --git a/scripts/adduser.sh b/scripts/adduser.sh
new file mode 100755
index 0000000..e76d582
--- /dev/null
+++ b/scripts/adduser.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+PASSWD_FILE="/etc/squid/passwd"
+
+# Ensure htpasswd is installed
+if ! command -v htpasswd &>/dev/null; then
+  echo "❌ 'htpasswd' not found. Please install apache2-utils (Debian/Ubuntu) or httpd-tools (RHEL/CentOS)."
+  exit 1
+fi
+
+# Ensure script is run as root
+if [[ $EUID -ne 0 ]]; then
+  echo "❌ This script must be run as root."
+  exit 1
+fi
+
+# Prompt for username
+read -rp "👤 Enter Squid proxy username: " username
+if [[ -z "$username" ]]; then
+  echo "❌ Username cannot be empty."
+  exit 1
+fi
+
+# Create the password file only if it doesn't exist
+if [[ ! -f "$PASSWD_FILE" ]]; then
+  echo "🔧 Creating new password file at $PASSWD_FILE"
+  htpasswd -c "$PASSWD_FILE" "$username"
+else
+  # Check if user exists
+  if grep -q "^$username:" "$PASSWD_FILE"; then
+    echo "⚠️  User '$username' already exists."
+    read -rp "🔄 Update password? (y/N): " answer
+    if [[ "$answer" =~ ^[Yy]$ ]]; then
+      htpasswd "$PASSWD_FILE" "$username"
+    else
+      echo "❌ Aborted."
+      exit 1
+    fi
+  else
+    htpasswd "$PASSWD_FILE" "$username"
+  fi
+fi
+
+# Fix permissions
+chmod 640 "$PASSWD_FILE"
+chown proxy:proxy "$PASSWD_FILE" 2>/dev/null || chown squid:squid "$PASSWD_FILE" 2>/dev/null
+
+echo "✅ User '$username' is set up for Squid."