<PackageReference Include="Microsoft.Identity.Client" Version="4.91.0" />

Microsoft.Identity.Client.UserAssertion

public sealed class UserAssertion
namespace Microsoft.Identity.Client { public sealed class UserAssertion { public string Assertion { get; } public string AssertionType { get; } public UserAssertion(string jwtBearerToken); public UserAssertion(string assertion, string assertionType); } }