NetBrain uses API (more specifically, Boto3 SDK) to retrieve the data from AWS. There are different ways to configure access to AWS, and we will explore each method in detail.

1. Key-based Access: Set up public and private keys so the NetBrain System can use static key(s) to discover AWS resources.
2. Role-based Access: Set up different roles for the NetBrain System to access AWS accounts, and it doesn’t require any static key.  
3. Combined Access: Configure the key-based access for one master account and then access the monitored accounts via the role-based access method.