ec2.describe_instances returns an empty Reservations list

I have an ec2 instance running.
If I use the aws cli command "aws ec2 describe-instances" I get this instance.
However when I try boto3 code:

import boto3
    
ec2 = boto3.client('ec2')
response = ec2.describe_instances()
print(response)

I get an empty Reservations list.

Any idea?

Edited by: amirdolev on Apr 20, 2020 1:34 AM