This tutorial will demonstrate how you can download an example file via DRS API. You can download any type of file, public or controlled, as long as:

To download a file using DRS API:

Create a new project.
For the purpose of this example we will add a public file by accessing the Public files tab and searching for example_human_reference.fasta.
Copy the file to your project. In addition:

The DRS ID is equal to the file ID on the Seven Bridges Platform (5dc018a9e4b0bf4ae31e92fc for this one).
The file ID is an integral part of the URL once you access the page with file details).
The DRS endpoint is https://cavatica-ga4gh-api.sbgenomics.com/ga4gh/drs/v1/

Obtain the authentication token from: https://cavatica.sbgenomics.com/developer#token and include it in the API call.
Perform the API call:

'$ curl -H "X-SBG-Auth-Token: <token>" 'https://cavatica-ga4gh-api.sbgenomics.com/ga4gh/drs/v1/objects/5d728923e4b09cae86687385'

The response will contain the access_id parameter, which you will use within the API call for retrieving the URL for downloading the file.

'$ curl -H "X-SBG-Auth-Token: <token>" 'https://cavatica-ga4gh-api.sbgenomics.com/ga4gh/drs/v1/objects/5d728923e4b09cae86687385/access/aws-us-east-1'

The response will contain the URL for downloading the file.