title: .NETCore PasswordHasher.HashPassword doesn't use TUser user ,but why included in the method signature?
body: <p><a href="https://sourcegraph.com/github.com/dotnet/aspnetcore/-/blob/src/Identity/Extensions.Core/src/PasswordHasher.cs#L96" rel="nofollow noreferrer">PasswordHasher.HashPassword</a> doesn't use TUser user, but why included in the method signature?</p>
  <p>Thanks!</p>
  <p><img src="https://i.stack.imgur.com/xOlFv.png" alt="" /></p>