setting up qt with beaglebone black

[qt_learning]

Hi
I want to program GUI on beaglebone black using Qt.
I am referring to https://wiki.qt.io/BeagleBone_Black_Beginners_Guide
I did well until number 3
but I have problem at number 4.
number 4 is as below

4. Clone the cross-compile-tools repository: This repository contains a script that will be used to fix some symbolic links.
workstation@workstation:~/opt$ git clone https://git.milosolutions.com/other/cross-compile-tools.git

that requested username and password as belows

son@ubuntu:/opt$ sudo git clone https://git.milosolutions.com/other/cross- compile-tools.git
[sudo] password for son: 
Cloning into 'cross-compile-tools'...
Username for 'https://git.milosolutions.com': 
Password for 'https://git.milosolutions.com': 
remote: HTTP Basic: Access denied
fatal: Authentication failed for 'https://git.milosolutions.com/other/cross-compile-tools.git/'

I don't know username and password. So I couldnot download them.
How can I download them. Can you help me?