Through Nginx how we can hide a part of url?

[Geo P.C.]

We are using a WordPress application with Nginx as web-server. Currently we
are accessing profile page as http://geo.mysite.com/members/geouser/ and is
working fine.

Can anyone please help me to accomplish the following that is when we
access profile page, in WordPress its should go to the url
*http://geo.mysite.com/members/
<http://geo.mysite.com/members/>geouser/* but in browser or in address bar
in browser it should not display something like *http://geo.mysite.com/members/
<http://geo.mysite.com/members/>geouser123* or *http://geo.mysite.com/members/
<http://geo.mysite.com/members/>user123/* etc..

So our need is in browser it should either hide or change real name but
inside application it should point correctly.

Can anyone please help on it.

Thanks
Geo
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