[FEATURE REQ] Add support for setting the OAuth 2.0 prompt= value

[peombwa]

Library name

Azure.Identity

Please describe the feature.

Add support for setting the OAuth 2.0 prompt query parameter value when requesting an authorization code - https://learn.microsoft.com/en-us/azure/active-directory/develop/v2-oauth2-auth-code-flow#request-an-authorization-code.

Microsoft Graph PowerShell relies on Azure.Identity to use MSAL. We currently have a requirement to support auth with AD FS, which requires having prompt=login to bypass single sign-on as explained at https://learn.microsoft.com/en-us/windows-server/identity/ad-fs/operations/ad-fs-prompt-login.

It does appear that there isn't an option available to specify the prompt value as the token credential classes default to prompt=select_account or prompt=none based on the login hint:

azure-sdk-for-net/sdk/identity/Azure.Identity/src/Credentials/InteractiveBrowserCredential.cs

Lines 235 to 241 in 36f54e7

	private async Task<AccessToken> GetTokenViaBrowserLoginAsync(TokenRequestContext context, bool async, CancellationToken cancellationToken)
	{
	Prompt prompt = LoginHint switch
	{
	null => Prompt.SelectAccount,
	_ => Prompt.NoPrompt
	};

[jsquire]

Thank you for your feedback. Tagging and routing to the team member best able to assist.