Secure SPARQL Endpoint Guide via SQL Accounts -- usage path digest authentication

The following Guide presents a sample scenario how SPARQL Endpoint can be protected using SQL Account digest authentication:

Go to http://cname/conductor.
Enter dba credentials:
Assign SPARQL_SELECT role to user for ex. with name "demo".
Go to Web Application Server -> Virtual Domains & Directories:
Locate the associated virtual folder with your Virtuoso SPARQL Endpoint and click "Edit":
At the "Authentication options" section apply the following settings:
1. Change Method to: Digest;
2. Add Realm value: SPARQL Endpoint;
3. Specify for Authentication Function the following function name: DB.DBA.HP_AUTH_SQL_USER;
Click "Save Changes".
At this stage you will be challenged when you go to /sparql via HTML or cURL (in this case use --digest option).
Access the SPARQL Endpoint by going to http://cname/sparql.
Should be challenged to enter Username and password:
Enter user "demo" credentials and click "Log in"
On successful log-in, the SPARQL Endpoint query execution page should be presented:

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