integration between one user databe to another wordpress

Hello
I was just wondering is it possible to connect one word press user database to another word press? for example /i have one word press installed under https://www.yourwp.com and there i have so many new users registered. now i want to install a second wordpress in the sub-domain of the https://www.yourwp.com but i dont want my users again register to access the content in the sub-domain of the earlier web site.

I would like to have a integrity between my main domain word-press and subdomain wordpress. only just the user database as i have different content on main domain and sub domain.

please help me if you have any solution to this
Thank you and love u all
eguru