Added script for basic auth user

lib/add_bc_user.sh

@@ -0,0 +1,18 @@
+#!/bin/bash -e
+
+echo "This script add's a user with password to the bridghead"
+read -p 'Username: ' bc_user
+read -sp 'Password: ' bc_password
+
+echo 
+
+bc=$(docker run --rm -ti xmartlabs/htpasswd $bc_user $bc_password)
+
+if [ -z $bc_auth_users ]; then
+    export bc_auth_users=$bc
+    echo $bc_auth_users
+else
+    export bc_auth_users="$bc_auth_users,$bc"
+    echo $bc_auth_users
+fi
+