aws assume role on shell script does not assume the role - amazon-web-services

Question

I'm following a tutorial where I assume roles on EC2 instances so it has access to services. I'm following this tutorial (https://medium.com/swlh/aws-iam-assuming-an-iam-role-from-an-ec2-instance-882081386c49), but I'm stuck on the cli part when I start running a "aws s3 ls". Just so I know it works, I gave the AssumedRole all access to s3.
This is my setup:
ImplicitRole // will be attached to EC2
policy:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": "sts:AssumeRole",
"Resource": "arn:aws:iam::xxx:role/*"
}
]
}
AssumedRole // will be the role assumed once logged in to EC2
policy:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:*"
],
"Resource": [
"arn:aws:s3:::*"
]
}
]
}
What happens is I would run the following on cli
aws sts assume-role --role-arn arn:aws:iam::****:role/AssumedRole --role-session-name test-session
Then I will get the Credentials
{
"Credentials": {
"AccessKeyId": "key",
"SecretAccessKey": "secret",
"SessionToken": "longtoken",
"Expiration": "2020-07-08T07:29:51+00:00"
},
"AssumedRoleUser": {
"AssumedRoleId": "AKDIEEOOKDLKSDJFDJ:test-session",
"Arn": "arn:aws:sts::xxxx:assumed-role/AssumedRole/test-session"
}
}
and then will update the variables eg: set AWS_ACCESS_KEY_ID=XXXX , etc
Once done I run the following but it would give me ListObject AccessDenied
aws s3 ls s3://bucket
An error occurred (AccessDenied) when calling the ListObjectsV2 operation: Access Denied