<PackageReference Include="Microsoft.Identity.Client" Version="4.83.3" />

Microsoft.Identity.Client.Internal.Requests.UsernamePasswordRequest

Handles requests that are non-interactive. Currently MSAL supports Integrated Windows Auth.
namespace Microsoft.Identity.Client.Internal.Requests { internal class UsernamePasswordRequest : RequestBase { public UsernamePasswordRequest(IServiceBundle serviceBundle, AuthenticationRequestParameters authenticationRequestParameters, AcquireTokenByUsernamePasswordParameters usernamePasswordParameters); } }