using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.SignalR;

public abstract class Result<T>
{
    public abstract bool Success {get;}

    public static Result<T> Ok(T value) => new SuccessResult<T>(value);
    public static Result<T> Fail(string error) => new FailureResult<T>(error);
}

public sealed class SuccessResult<T> : Result<T>
{
    public override bool Success => true;
    public T Value {get;}

    public SuccessResult(T value)
    {
        Value = value ?? throw new ArgumentNullException(nameof(value));
    }

}

public sealed class FailureResult<T> : Result<T>
{
    public override bool Success => false;

    public string Error {get;}

    public FailureResult(string error)
    {
        Error = error ?? throw new ArgumentNullException(nameof(error));
    }

}