Add information about admin role which will be automatically granted to the creator of the collection

This information is given in the configuration guide, but it is missing in the user guide, where users will search for it at first place.

Author: ischmahl

doc/sphinx-guides/source/user/dataverse-management.rst

@@ -111,7 +111,7 @@ Dataverse installation user accounts can be granted roles that define which acti
 
 Roles and permissions may also be granted to groups. Groups can be defined as a collection of Dataverse installation user accounts, a collection of IP addresses (e.g. all users of a library's computers), or a collection of all users who log in using a particular institutional login (e.g. everyone who logs in with a particular university's account credentials).
 
-Admins of a Dataverse collection can assign roles and permissions to the users of that Dataverse collection. If you are an admin on a Dataverse collection, then you will find the link to the Permissions page under the Edit dropdown on the Dataverse collection page. 
+The user who creates a dataverse is given the "Admin" role on that dataverse (see :doc:`/installation/installation/config.rst#root-dataverse-collection-permissions`). Admins of a Dataverse collection can assign roles and permissions to the users of that Dataverse collection. If you are an admin on a Dataverse collection, then you will find the link to the Permissions page under the Edit dropdown on the Dataverse collection page. 
 
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