www-data user and group both missing CentOS 7

I was working on my WordPress website and I got some HTTP ERROR 500 and then i checked the user and user groups of my WordPress via FTP and I found that all belong to 1000:1000 user. I tried to change that to www-data:www-data. But getting invalid user: 'www-data:www-data' error.

cut -d: -f1 /etc/group | sort code didn't show anything of www-data group

So its confirmed that www-data group is missing from my web server. SO now how to create a new www-data group and www-data user with same credentials?

You have cross posted duplicated (see https://www.linuxquestions.org/quest...-a-4175646418/) in violation of site rules. Please close one or the other.

Closed per above