[Feature Request] Add new WithCustomHeaders() Api while acquiring token via MSAL

[ashakhatri007]

MSAL client type

Confidential

Problem statement

Currently for APPKI to DSTS authentication, we need to pass in custom headers in OnBeforeTokenRequest() to get our requests land to specific service.

Can we introduce a new api WithCustomHeaders that will take input of a dictionary of headers (key value pairs) that will automatically get added before fetching token from ests.

Proposed solution

No response

Alternatives

No response

[gladjohn]

@ashakhatri007, @bgavrilMS pointed out that we already have an API for that at request level WithExtraHttpHeaders. Let me see how we can use this.

[gladjohn]

Please include Microsoft.Identity.Client.Advanced and you should be able to use it. reference - https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/pull/5440/files