Updated AWS IAM CLI (markdown)

AWS-IAM-CLI.md

@@ -4,6 +4,16 @@ See [AWS-CLI-with-SeaweedFS](https://github.com/chrislusf/seaweedfs/wiki/AWS-CLI
 
 # Execute commands
 
+## Pre-requisite
+
+* Remove `-s3.config` params
+* Create an admin through `weed shell`, and use these credentials to access IAM
+
+e.g.:
+```
+s3.configure -apply -user admin -access_key some_access_key1 -secret_key some_secret_key1 -actions Admin
+```
+
 ## Create S3 credentials 
 
 Create user and access key