Hi, 

When trying to setup the EC2 plugin with an instance using 'IMDSv2' I get the following error

Failed to obtain credentials from EC2 instance profile: Unauthorized (Service: null; Status Code: 401; Error Code: null; Request ID: null; Proxy: null) 

However, when I run through the steps on the EC2 instance running the Jenkins Controller I can successfully retrieve credentials for the instance i.e.

TOKEN=`curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600"` \
&& curl -H "X-aws-ec2-metadata-token: $TOKEN" http://169.254.169.254/latest/meta-data/iam/security-credentials/<IAM ROLE OF EC2 INSTANCE> 

This command comes from the AWS docs.

Not sure if I'm doing something wrong or if the plugin doesn't support instances running on V2 of the Instance Metadata Service?