We will add an Amazon Web Services cloud to Ansible Tower and fetch the hosts present in the cloud dynamically. Let's start by creating a cloud credential.

1. We want to create a credential of the type Amazon Web Services, so go to the settings button and select the CREDENTIALS section.
2. In the NEW CREDENTIAL section, we can specify the name of the key. Here, we would set the CREDENTIAL TYPE as Amazon Web Services.

3. The form will expand so we can provide the AWS access key and secret key and save the credential.

4. After the credential has been set up, we need to go to Inventories and add a new inventory by clicking on the +ADD button and selecting Inventory from the menu.
5. Before we can configure the inventory, we need to supply a name and save it.
6. After saving the inventory, we need to go to the SOURCES tab and click on the +ADD SOURCE button.
7. Here, we have to specify a name and set the source to Amazon EC2 from the dropdown and add the credential using the lens button in the CREDENTIAL field. Save this source.
8. Lastly, from the SOURCES tab, click on the SYNC ALL button to sync the source. A green cloud icon next to the name of the source signifies that our inventory is ready to use.