We need to confirm the following conditions have been met:
The user is an Tenable-Provided Roles and is Administrator (and not custom role)
The admin has all permissions and privileges (value64) - for more information see here
The admin is associated with the relevant Asset Groups
Create New API Key
With the Administrator user from the section above, go to "My Account" page
Click the API Keys tab and then Generate
Review the warning and click Generate
Copy the new access and secret keys. Be sure to copy the access and secret keys before you close the API Keys tab. After you close this tab, you cannot retrieve the keys from Tenable.io
Collection Instance Details
Name: <Friendly name for this collection instance>
Access Key: <the access key string>
Secret Key: <the secret key string>