Can we public AzureKeyCredentialPolicy and move it to Azure.Core?

[chunyu3]

There are many services which use Azure-Key for authentication. see following

@useAuth(ApiKeyAuth<ApiKeyLocation.header, "Ocp-Apim-Subscription-Key">)
@useAuth(BearerAuth)
@server(
    "{endpoint}/computervision",
    "Analyze an image to generate a description of its content.",
    {
      @doc("""
  Supported Cognitive Services endpoints (protocol and hostname, for example:
  https://<resource-name>.cognitiveservices.azure.com).
  """)
      endpoint: url,
    }
  )

In the generated SDKs, we will create AzureKeyCredentialPolicy for this authentication and add it to the Azure Core Pipeline.

_pipeline = HttpPipelineBuilder.Build(options, Array.Empty<HttpPipelinePolicy>(), new HttpPipelinePolicy[] { new AzureKeyCredentialPolicy(_keyCredential, AuthorizationHeader) }, new ResponseClassifier());

It will fail to build the SDK because AzureKeyCredentialPolicy is internal.

Workaround:
service team need manually add <Compile Include="$(AzureCoreSharedSources)AzureKeyCredentialPolicy.cs" LinkBase="Shared/Core" /> in project file(.csproj).

Affect:
It breaks sdk automation and need extra manual work for service team after he generate the SDK.

Solution:
If AzureKeyCredentialPolicy is public class and included in Azure.Core library as BearerTokenAuthenticationPolicy, the class will be automatically loaded and do not need to manually update the project file.

Can we make AzureKeyCredentialPolicy public class and include in Azure.Core as BearerTokenAuthenticationPolicy?

[annelo-msft]

@chunyu3, SCM ApiKeyCredentialPolicy has shipped in SCM. Once we can add SCM policies to Azure pipelines, I believe it will satisfy this feature request.