Here are some examples of adding S3 remotes:
Example 1
pshell:/> remote add project123 s3 https://projects.pawsey.org.au pshell:/> remote project123 project123:/>login Access: xyz Secret: ***
Example 2
pshell:/> remote add my-aws s3 'ap-southeast-2' pshell:/> remote my-aws my-aws:/>login Access: xyz Secret: ***