Studio 2.0 includes the new Security Management where you can manage Users and Roles in a graphical way. For detailed information about Security in OrientDB, visit here
Here you can manage the database users:
To add a new User, click the Add User button, complete the information for the new user (name, password, status, roles) and then save to add the new user to the database.
Here you can manage the database roles:
To add a new User, click the Add Role button, complete the information for the new role (name, parent role, mode) and then save to add the new role to the database.
To add a new security rule for the selected role, click the Add Rule button. This will ask you the string of the resource that you want to secure. For a list of available resources, visit the official documentation here
Then you can configure the CRUD permissions on the newly created resource.