Added CORS, added specific type for token in AuthToken.cs, added login page to blazor client

SchengenVisaApi/BlazorWebAssemblyVisaApiClient/Pages/Auth.razor

@@ -0,0 +1,35 @@
+@page "/login"
+@using VisaApiClient
+
+<PageTitle>Authentication</PageTitle>
+
+<EditForm Model="loginData" OnValidSubmit="TryLogin">
+    <DataAnnotationsValidator/>
+    <label >Email: <InputText @bind-Value="loginData.Email"/></label>
+    <label >Password: <InputText @bind-Value="loginData.Password"/></label>
+    <input type="submit" value="Login"/>
+</EditForm>
+<p>@loginResult</p>
+
+@code
+{
+    private AuthData loginData = new();
+    private string loginResult = String.Empty;
+
+    [Inject]
+    private Client Client { get; set; } = null!;
+
+    private async Task TryLogin(EditContext obj)
+    {
+        try
+        {
+            var token = await Client.LoginAsync(loginData.Email, loginData.Password);
+            Client.SetAuthToken(token);
+            loginResult = "Logged in successfully";
+        }
+        catch (ApiException<ProblemDetails> e)
+        {
+            loginResult = e.Result.Detail!;
+        }
+    }
+}