controller.cs

[HttpGet]
public async Task<IActionResult> Get()
{
    var rng = new Random();
    var data = Enumerable.Range(1, 5).Select(index => new WeatherForecast
    {
        Date = DateTime.Now.AddDays(index),
        TemperatureC = rng.Next(-20, 55),
        Summary = Summaries[rng.Next(Summaries.Length)]
    })
    .ToArray();
    return Ok(new {
        WeatherMan = (await _userService.GetUserAsync(this.User.Identity.Name)).FullName,
        Data = data
    });
}