The Amazon S3 connection type requires the following information in order to be validated and created with success:
Label: the name of the connection to identify on the interface
Bucket name = folder to retrieve the files
Region = server region
...
Access key id: the user to use in order to connect on the FTP
Secret access key: the user’s password to authentify on the FTP
...
Once all fields are set, click create to finalize the new connection. Upon click, a tentative of connection with the provided information will be attempted. If it fails an error will be returned and it will be possible to edit the fields.