Implemented Login workflow

SpotiParty.Web/Components/Pages/CallbackPage.razor

@@ -0,0 +1,27 @@
+@page "/callback"
+@using SpotiParty.Web.Services
+@inject NavigationManager Navigator
+@inject AuthorizationHandler AuthHandler
+
+@code {
+    [Parameter, SupplyParameterFromQuery(Name = "error")]
+    public string? Error { get; set; }
+
+    [Parameter, SupplyParameterFromQuery(Name = "code")]
+    public string? Code { get; set; }
+
+    [Parameter, SupplyParameterFromQuery(Name = "state")]
+    public string? State { get; set; }
+
+    protected override async Task OnInitializedAsync() {
+        await base.OnInitializedAsync();
+
+        if (string.IsNullOrWhiteSpace(Code)) {
+            Navigator.NavigateTo("/login", forceLoad: true);
+            return;
+        }
+
+        await AuthHandler.HandleCallback(Code);
+        Navigator.NavigateTo("/enqueue", forceLoad: true);
+    }
+}