Open a new powershell:
Type:
aws emr ssh --key-pair-file ~/ProjectProAlexClark.pem --cluster-id j-3SV9H2OBTRTDT
You’ll have to change ProjectProAlexClark.pem and j-3SV9H2OBTRTDT
ProjectProAlexClark.pem
j-3SV9H2OBTRTDT
you could get your Cluster id and Key pair in EC2