ArangoDB v3.10 is under development and not released yet.
This documentation is not final and potentially incomplete.
Managing Users in the Web Interface
ArangoDB users are globally stored in the _system database and can only be mananged while logged on to this database. There you can find the Users section:
Select a user to bring up the General tab with the username, name and active status, as well as options to delete the user or change the password.
Select a user and go to the Permissions tab. You will see a list of databases and their corresponding database access level for that user.
Please note that server access level follows from the access level on
the database _system. Furthermore, the default database access level
for this user appear in the artificial row with the database name
Below this table is another one for the collection category access
levels. At first, it shows the list of databases, too. If you click on a
database, the list of collections in that database will be open and you
can see the defined collection access levels for each collection of that
database (which can be all unselected which means that nothing is
explicitly set). The default access levels for this user and database
appear in the artificial row with the collection name
Also see Managing Users about access levels.