Login error when input wrong credentials " An unhandled exception occurred during the execution of the current web request - indexoutofrangeexception

Question

These in ASP.NET application of which I am starting to learn. There is an error stating System.IndexOutOfRangeException: UserId.
Here is the code:
protected void ValidateUser(object sender, EventArgs e)
{
int userId = 0;
string roles = string.Empty;
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("Validate_User"))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#Username", Login1.UserName);
cmd.Parameters.AddWithValue("#Password", Login1.Password);
cmd.Connection = con;
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
reader.Read();
userId = Convert.ToInt32(reader["UserId"]);
roles = reader["Roles"].ToString();
con.Close();
}
switch (userId)
{
case -1:
Login1.FailureText = "Username and/or password is incorrect.";
break;
case -2:
Login1.FailureText = "Account has not been activated.";
break;
default:
FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1, Login1.UserName, DateTime.Now, DateTime.Now.AddMinutes(2880), Login1.RememberMeSet, roles, FormsAuthentication.FormsCookiePath);
string hash = FormsAuthentication.Encrypt(ticket);
HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hash);
if (ticket.IsPersistent)
{
cookie.Expires = ticket.Expiration;
}
Response.Cookies.Add(cookie);
Response.Redirect(FormsAuthentication.GetRedirectUrl(Login1.UserName, Login1.RememberMeSet));
break;
}
}
}
}
}
Here is the Image to the error
Error message