<PackageReference Include="Microsoft.Identity.Client" Version="4.82.1" />

Microsoft.Identity.Client.Internal.ClientCredential.SignedAssertionClientCredential

class SignedAssertionClientCredential : IClientCredential
public AssertionType AssertionType { get; }

public SignedAssertionClientCredential(string signedAssertion)

public Task<ClientCredentialApplicationResult> AddConfidentialClientParametersAsync(OAuth2Client oAuth2Client, AuthenticationRequestParameters requestParameters, ICryptographyManager cryptographyManager, string tokenEndpoint, CancellationToken cancellationToken)