In order to use the ArcGIS mapping platform, you have to create an account in the myESRI portal.
To do so, just go to https://my.esri.com/ and click on "Create a public account".

You will be asked for your first and last name and mail address. After entering your personal information choose "Create an Account" (you can also log in using your Facebook or Google profile).

The activation e-mail will be sent into your mailbox.

After clicking the "Activate Your Account" box, you will be redirected to ESRI website, where you will have to complete the form with your new username (please choose the unique name), password, personal information and security question in case of retrieving password.
When finished, choose "Create Account" and you will be allowed to log in using your new username and password.

Once you have your own profile in myESRI, the next step will be signing up for the 21-Day Trial version of ArcGIS Pro.

Go to the website https://www.esri.com/en-us/arcgis/products/arcgis-pro/trial and fill the form on the right side of the screen.

After clicking the "Start Trial" button, the activation mail will be sent to your mailbox.

After clicking the activation link, you will be redirected to another page, where you will be asked for a new unique username, password, your organization name, security question and an agreement for the Terms of Use.

After that, choose "Create my account", on next page choose your organization abbreviation, preferred language, your region and possible link for contact with your company.

Click "Save and continue" and you will be moved to your dashboard.

If you want to assign license ArcGIS Pro to your user, choose Licenses tab and click Manage on the desired product or extension.

And turn the trigger on.

The next step will be creating a Virtual Machine which has preinstalled ArcGIS Pro in the Windows environment.
To do so, please create it using this how-to article How to create new VM in OpenStack dashboard (Horizon)? but while selecting a boot source as an image select "Windows 2016+ArcGIS (19.29)" image. Please be aware, that the process of initializing this image can take a while (up to 1h).

After launching and logging in to the instance, choose ArcGIS -> ArcGIS Pro from Start Menu.

Enter the credentials of your account used in free trial registration.

The ArcGIS Pro cockpit will appear.

Next step will be connecting EOData repository with existing ArcGIS Pro installation.

First, click "Catalog":

You will be asked for name and path for the newly created project.

In "Catalog" menu, choose "Insert" tab, select "Connections" and "Add Cloud Storage Connection".

You will have to set up connection using following values:

Service Provider : AMAZON

Bucket (Container) Name: EODATA

Access Key ID (Account Name): access

Secret Access Key (Account Key): access

Region (Environment): RegionOne

Service Endpoint: data. cloudferro.com

After accepting configuration,  enter the folder of your project, and click on the file with name of your project and .acs extension.

You will be able to browse EOData repository now.