Basic authentication requires access key and secret key values from your AWS account.

IAM authentication requires attaching policies to the EC2 role to grant access to specific folder paths and access Amazon S3 objects .

AssumeRole with EC2 role authentication requires you to enable the EC2 role to assume another IAM role specified by the IAM Role ARN.

AssumeRole with IAM user authentication requires the access key and secret key values of the IAM user and the ARN of the IAM role.

Credential profile file authentication requires the credential profile file path and profile name.

Federated user single sign-on authentication requires the user name and password of the federated user, IdP SSO URL, ARN of the SAML identity provider, and ARN of the IAM role assumed by the federated user. You can only use ADFS 3.0 (IDP) for SSO.