Install the AWS Command Module
Install-Module -Name AWSPowerShell
Create new profile or update existing
Set-AWSCredential -AccessKey <aKey> -SecretKey <sKey> -StoreAs <profileName>
List current credential profiles in the key store
Get-AWSCredential -ListProfileDetail
Set a credential profile to be used in this session
Set-AWSCredential -ProfileName <profileName>
Get the default AWS region you have set
Get-DefaultAWSRegion
Set the region to be used in this session
Set-DefaultAWSRegion -Region us-west-2
Set the default profile for the account
Initialize-AWSDefaultConfiguration -ProfileName <profileName> -Region <region>