HttpContext.SignInAsync does not work when you consume it through .razor page

I implement ASP.NET Core cookie Authentication In blazor server side.I write simple API Controller with Login endpoint.

When I post to API via postman everything works fine and I become identified and Authorized.

When I post via HttpClient: _http.PostJsonAsync<bool>("api/auth/Login", credentials);

I hit the API endpoint and its run to till end without error but the Authentication State don't change and no cookie is created.

var res = await _http.PostJsonAsync<bool>("api/v1/Auth/Login", credentials);

api:

[AllowAnonymous][HttpPost][Route("Login")]public async Task<bool> Login(){  const string Issuer = "mydomain.com";  var claims = new List<Claim>  {    new Claim("ID", dataTable.Rows[0]["ID"].ToString(), ClaimValueTypes.String, Issuer),    new Claim("FullName", dataTable.Rows[0]["FullName"].ToString(), ClaimValueTypes.String, Issuer),    new Claim("CompanyName", dataTable.Rows[0]["CompanyName"].ToString(), ClaimValueTypes.String, Issuer),    new Claim("Email", dataTable.Rows[0]["Email"].ToString(), ClaimValueTypes.String, Issuer),  };  var userIdentity = new ClaimsIdentity(claims, "User");  var userPrincipal = new ClaimsPrincipal(userIdentity);  await HttpContext.SignInAsync  (    CookieAuthenticationDefaults.AuthenticationScheme,    userPrincipal,    new AuthenticationProperties    {      ExpiresUtc = DateTime.UtcNow.AddMinutes(20),      IsPersistent = false,      AllowRefresh = false    }  );  return true;}