can't access to user page to but credit

Hello ,
after reading almost everything in the Wiki about the user manager
I must say it doesn’t help at all - you must replace it

but after said this -
if I understand it correctly , in order to get to the customer\end-user\the user that will use the hotspot
I need to direct him to this link

<a href="http://%hostname%/user/admin">press here for see your page :-) </a>

I have also try this

<P><a href="http://10.0.0.4/user/signup/$(server-name)?dst=$(link-orig-esc)">Click here for more information. </a></P>

where the user is constant
and the admin is user name of the user manager admin (I have only 1 admin in the user manager)

is that true?

if so - why I get error 404 page not found?

what is the link I need to show so the user will be able to but credit?

can someone guide\help with this?

Thanks ,