Add a creds AWS CLI alias.

For exporting the AWS environment variables for SSO.

.aws/cli/alias

@@ -14,3 +14,4 @@ du = s3 ls --recursive --human-readable --summarize
 enable_ena = ec2 modify-instance-attribute --ena-support --instance-id
 assume-role = !assume-role
 s3-etag = !f() { aws s3api head-object --bucket "$1" --key "$2" --query 'ETag' --output text | xargs; }; f
+creds = !eval $(aws configure export-credentials --format env)