$ ./awscurl --service ec2 --profile dummy --region us-wes
t-2 'https://ec2.amazonaws.com?Action=DescribeRegions&Version=2013-10-15'
<?xml version="1.0" encoding="UTF-8"?>
<Response><Errors><Error><Code>AuthFailure</Code><Message>AWS was not able to validate the provided access credentials</Message></Error></Errors><RequestID>870b1f2f-a08d-4d9c-938b-b9d8e6331b66</RequestID></Response>

$ ./awscurl --service ec2 --profile dummy --region us-west-2 'https://ec2.amazonaws.com?Action=DescribeRegions&Version=2013-10-15' --debug
REQUEST GET /?Action=DescribeRegions&Version=2013-10-15 HTTP/1.1
Host: ec2.amazonaws.com
User-Agent: Go-http-client/1.1
Authorization: AWS4-HMAC-SHA256 Credential=ABCDEF1234567890ABCD/20250203/us-west-2/ec2/aws4_request, SignedHeaders=content-type;host;x-amz-date, Signature=9e2da7dbc8f78379920604765b635f60ccd9e0b948478097574405e209f24927
Content-Type: application/x-amz-json-1.1
X-Amz-Date: 20250203T161532Z
Accept-Encoding: gzip

RESPONSE HTTP/1.1 401 Unauthorized
Transfer-Encoding: chunked
Cache-Control: no-cache, no-store
Content-Type: text/xml;charset=UTF-8
Date: Mon, 03 Feb 2025 16:15:32 GMT
Server: AmazonEC2
Strict-Transport-Security: max-age=31536000; includeSubDomains
Vary: accept-encoding
X-Amzn-Requestid: ef614978-a544-4137-a3ee-47e697d2a3a1

fe
<?xml version="1.0" encoding="UTF-8"?>
<Response><Errors><Error><Code>AuthFailure</Code><Message>AWS was not able to validate the provided access credentials</Message></Error></Errors><RequestID>ef614978-a544-4137-a3ee-47e697d2a3a1</RequestID></Response>
0


<?xml version="1.0" encoding="UTF-8"?>
<Response><Errors><Error><Code>AuthFailure</Code><Message>AWS was not able to validate the provided access credentials</Message></Error></Errors><RequestID>ef614978-a544-4137-a3ee-47e697d2a3a1</RequestID></Response>