is there a way how i can save the username which i use to log in to save in another script which i can use to save highscore in my database.

hi programmers and friend. first of all sorry for my bad english/grammer. i started with Unity 1 week ago and i enjoy it when im developing games. i started with the Roll A Ball tutorial. and i made my own levels. i was thinking to make a log in screen and i made it. i used MSSQL(because i have experience with it) and the log in page succeed but i also want that if u log in with a specific name that it saves the username in another script so i can use it in the levels to save scores in their own database row.

my question is: is there a way how i can save the username which i use to log in to save in another script which i can use to save highscore in my database.

here are some codes and evidence:

 using UnityEngine;
 using UnityEngine.UI;
 using System.Collections;
 using System;
 using System.Text.RegularExpressions;
 using System.Data;
 using System.Data.SqlClient;
 
 public class Login : MonoBehaviour {
 
     public GameObject username;
     public GameObject password;
     public Text errormessage;
     private string Username;
     private string Password;
     private string Form;
 
     void Start () {
         errormessage.text = "";
     }
     
     void Update () {
         Username = username.GetComponent<InputField>().text;
         Password = password.GetComponent<InputField>().text;
 
         if (Input.GetKeyDown(KeyCode.Tab))
         {
             if(username.GetComponent<InputField>().isFocused)
             {
                 password.GetComponent<InputField>().Select();
             }
         }
 
         if (username.GetComponent<InputField>().text != "" &&
             password.GetComponent<InputField>().text != "" &&
             Input.GetKeyDown(KeyCode.Return))
         {
             LoginButton();
         }
     }
 
     public void LoginButton()
     {
         SqlConnection con = new SqlConnection("Data Source=(local);Initial Catalog=Roll A Ball;Integrated Security=True");
         bool login = false;
         con.Open();
         string sql = "SELECT * FROM Login WHERE Username='" + Username + "' and Password='" + Password + "'";
         SqlCommand cmd = new SqlCommand(sql, con);
         SqlDataReader dr = cmd.ExecuteReader();
         while (dr.Read())
         {
             login = true;
         }
         dr.Close();
         con.Close();
         if (login == true)
         {
             Application.LoadLevel(1);
         }
         else
         {
             errormessage.text = "Failed To Log In";
         }
     }
 }

Screenshots from the MSSQL DB table: http://prntscr.com/cf7ess http://prntscr.com/cf7f1d

i hope i was clear enough and if u want more codes or even my project. write a comment. thank you in advance.

EDIT: i think i wasn't clear enough. i have 2 databases: Login and Highscore. i also have a Login page. in the login page when i try to login, i use a Username and a Password. the Username is saved in the script Login. but after the Login i need to know with which username i logged in so i want to save the Username which i used in the Login page in another script so i can use that Username to save my highscore.

In General: is there a way how to acces or save a Variable in another script?