warn: Microsoft.AspNetCore.Components.Server.Circuits.RemoteRenderer[100]
      Unhandled exception rendering component: OnStarting cannot be set because the response has already started.
      System.InvalidOperationException: OnStarting cannot be set because the response has already started.
         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ThrowResponseAlreadyStartedException(String value)
         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.OnStarting(Func`2 callback, Object state)
         at CustomAuthenticationStateProvider.MarkUserAsAuthenticated(String username, String role) in /Users/ensarerdeve/Documents/VSC Projects/testtrack/ProtaTestTrack2/Services/CustomAuthenticationProvider.cs:line 34
         at ProtaTestTrack2.Components.Pages.Login.LoginUser() in /Users/ensarerdeve/Documents/VSC Projects/testtrack/ProtaTestTrack2/Components/Pages/Login.razor:line 40
         at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
         at MudBlazor.MudBaseButton.OnClickHandler(MouseEventArgs ev)
         at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, 

warn: Microsoft.AspNetCore.Components.Server.Circuits.RemoteRenderer[100]
      Unhandled exception rendering component: OnStarting cannot be set because the response has already started.
      System.InvalidOperationException: OnStarting cannot be set because the response has already started.
         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ThrowResponseAlreadyStartedException(String value)
         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.OnStarting(Func`2 callback, Object state)
         at CustomAuthenticationStateProvider.MarkUserAsAuthenticated(String username, String role) in /Users/ensarerdeve/Documents/VSC Projects/testtrack/ProtaTestTrack2/Services/CustomAuthenticationProvider.cs:line 34
         at ProtaTestTrack2.Components.Pages.Login.LoginUser() in /Users/ensarerdeve/Documents/VSC Projects/testtrack/ProtaTestTrack2/Components/Pages/Login.razor:line 40
         at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
         at MudBlazor.MudBaseButton.OnClickHandler(MouseEventArgs ev)
         at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, 

@page "/register"
@using System.ComponentModel.DataAnnotations
@inject HttpClient http

<PageTitle>Registration</PageTitle>

<h1>Fill For Registration</h1>

<EditForm Model="@registration" OnSubmit="@Submit" FormName="RegisterForm" action="http://localhost:5234/User">
    <div>
        <label>Name:
            <InputText @bind-Value="@registration.Name" />
        </label>
    </div>
    <div>
        <label>Surname:
            <InputText @bind-Value="@registration.Surname" />
        </label>
    </div>
    <div>
        <label>Username:
            <InputText @bind-Value="@registration.Username" />
        </label>
    </div>
    <div>
        <label>Email:
            <InputText @bind-Value="@registration.Email" />
        </label>
    </div>
    <div>
        <label>Phone:
            <InputText @bind-Value="@registration.Phone" />
        </label>
    </div>
    <div>
        <label>Age:
            <InputNumber @bind-Value="@registration.Age" />
        </label>
    </div>
    <div>
        <button type="submit">Register</button>
    </div>
</EditForm>

@code{
    public class UserDto
    {
        public string Name { get; set; }
        public string Surname { get; set; }
        public string Username { get; set; }
        public string Email { get; set; }
        public string Phone { get; set; }
        public decimal Age { get; set; }
    }
    private UserDto registration = new UserDto();
    private async Task Submit()
    {
        var url = "http://localhost:5234/User";
        await http.PostAsJsonAsync(url, registration);
    }

}

@page "/register"
@using System.ComponentModel.DataAnnotations
@inject HttpClient http

<PageTitle>Registration</PageTitle>

<h1>Fill For Registration</h1>

<EditForm Model="@registration" OnSubmit="@Submit" FormName="RegisterForm" action="http://localhost:5234/User">
    <div>
        <label>Name:
            <InputText @bind-Value="@registration.Name" />
        </label>
    </div>
    <div>
        <label>Surname:
            <InputText @bind-Value="@registration.Surname" />
        </label>
    </div>
    <div>
        <label>Username:
            <InputText @bind-Value="@registration.Username" />
        </label>
    </div>
    <div>
        <label>Email:
            <InputText @bind-Value="@registration.Email" />
        </label>
    </div>
    <div>
        <label>Phone:
            <InputText @bind-Value="@registration.Phone" />
        </label>
    </div>
    <div>
        <label>Age:
            <InputNumber @bind-Value="@registration.Age" />
        </label>
    </div>
    <div>
        <button type="submit">Register</button>
    </div>
</EditForm>

@code{
    public class UserDto
    {
        public string Name { get; set; }
        public string Surname { get; set; }
        public string Username { get; set; }
        public string Email { get; set; }
        public string Phone { get; set; }
        public decimal Age { get; set; }
    }
    private UserDto registration = new UserDto();
    private async Task Submit()
    {
        var url = "http://localhost:5234/User";
        await http.PostAsJsonAsync(url, registration);
    }

}