There are 2 identifiers associated with an S3 account they are:
Access Key Id, 20 characters long. Example: 022QF06E7MXBSH9DHM02
022QF06E7MXBSH9DHM02
Secret Access Key, 40 characters long. Example kWcrlUX5JEDGM/LtmEENI/aVmYvHNif5zB+d9+ct
kWcrlUX5JEDGM/LtmEENI/aVmYvHNif5zB+d9+ct