Can I configure CloudWatch datasource with Key + AssumeRole?

Hi there

In AWS IAM I’ve a “grafana” user which can only assume a “metrics_readonly” role. So I’ld like to configure myCloudWatch datasource with this user’s AWS_ KEY & ID, and an AssumeRole. Is this possible ?

If not, since I don’t want to attach a specific profile to the instance, I guess I’ve no other choice than to directly give the policy to the user, without assumerole ?

Thanks in advance for helping