Uploadsigningcertificate
Uploads an X.509 signing certificate and associates it with the specified IAM user. Some Amazon Web Services services require you to use certificates to validate requests that are signed with a corresponding private key. When you upload the certificate, its default status is Active. For information about when you would use an X.509 signing certificate, see Managing server certificates in IAM in the IAM User Guide. If the UserName is not specified, the IAM user name is determined implicitly ba...