我已经用angular和ionic创建了一个登录页面。现在，我已经用c#编写了api，当用户单击login按钮时，我想调用它。

[Route("api/LoginforApp/"), HttpPost]
        public string LoginforApp([FromBody] LoginModel user)
        {
            char quote = '"';
            try
            {
                if (defaulttoken == user.Token)
                {
                    int flag = PassEncryptornot(user.Email);
                    if (flag == 0)
                    {
                        password = user.Password == null ? "" : user.Password;
                    }
                    else
                    {
                        string pswd = Encrypt(user.Password == null ? "" : user.Password);
                        password = pswd;
                    }
                    db.AddParameter("@Emailid", user.Email == null ? "" : user.Email);
                    db.AddParameter("@password", password);
                    ds = db.ExecuteDataSet("ps_MemberLogin", CommandType.StoredProcedure);
                    dt = ds.Tables[0];
                    if (dt.Rows.Count > 0)
                    {
                        //var response = dt.Rows[0]["Message"].ToString();
                        var result = dt;
                        var json = DataTableToJSONWithJSONNet(dt);
                        return json;
                    }
                    else
                    {
                        return "Invalid Username and Password.";

如何在我的ionic-angular应用程序中调用此代码？