`endpoint_url` from profile is ignored

[hammypants]

Describe the bug

The endpoint_url of a credentials/profile file setup (in their default locations) is not used.

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

I would expect this to work as if one had set AWS_Endpoint_Url, which does work.

Current Behavior

endpoint_url in a profile config file is not used despite other profile config values being used.

Reproduction Steps

Given credentials like

[localstack]
aws_access_key_id = test
aws_secret_access_key = test

and a config profile:

[profile localstack]
region = us-east-1
endpoint_url = http://localhost.localstack.cloud:4566
output = json

When launching a dotnet app with the environment variable AWS_Profile set (or the profile set via Microsoft's configuration APIs, or AWSOptions, etc... doesn't matter which) to localstack, the profile is resolved, the region is respected, but the endpoint_url is not.

Possible Solution

No response

Additional Information/Context

No response

AWS .NET SDK and/or Package version used

All AWS packages, straight from the project references:

<PackageReference Include="Amazon.Extensions.Configuration.SystemsManager" Version="7.0.0" />
<PackageReference Include="AWSSDK.Extensions.NETCore.Setup" Version="4.0.2" />
<PackageReference Include="AWS.Messaging" Version="1.0.0" />
<PackageReference Include="AWSSDK.S3" Version="4.0.3.2" />
<PackageReference Include="AWSSDK.SSO" Version="4.0.1.8" />
<PackageReference Include="AWSSDK.SSOOIDC" Version="4.0.2.5" />

Targeted .NET Platform

.NET 8

Operating System and version

Windows 11, Ubuntu 20+

[dscpinheiro]

It's not very intuitive, but this is expected behavior. The endpoint URL and the region are mutually exclusive and one of them will overwrite the other if both are set.

This page on the LocalStack docs has more details on how you need to configure the client (endpoint_url is equivalent to ServiceURL, and AuthenticationRegion only exists on the C# class - you cannot set it from the config file): https://docs.localstack.cloud/aws/integrations/aws-sdks/net/#overview

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