<add name="DefaultConnection" connectionString="Data Source=192.168.1.106; Initial Catalog=Gesuro; Integrated Security=True; User ID = sergio; Password=xxxxxxxx" providerName="System.Data.SqlClient" />

var token = await this.apiService.GetToken(
            "http://localhost:50965",
            this.Email,
            this.Password);

public async Task<TokenResponse> GetToken(
        string urlBase,
        string username,
        string password)
    {
        try
        {
            var client = new HttpClient();
            client.BaseAddress = new Uri(urlBase);
            var response = await client.PostAsync("Token",
                new StringContent(string.Format(
                "grant_type=password&username={0}&password={1}",
                username, password),
                Encoding.UTF8, "application/x-www-form-urlencoded"));
            var resultJSON = await response.Content.ReadAsStringAsync();
            var result = JsonConvert.DeserializeObject<TokenResponse>(
                resultJSON);
            return result;
        }
        catch (Exception e)
        {
            var pepe = e.Message;
            return null;
        }
    }