banking program, function not calling

[TheJast]

hey, so i have to create this banking program for my cs1 class and for some reason after my createAccount function is used and i go to my logIn function it doesn't recognize my username and password. i'm not sure why. functions are new to me, so if i'm doing something incorrect please help.

#include <iostream>
#include <string>
#include <cmath>
#include <iomanip>
#include <string>
#include <stdbool.h>

using namespace std;

//function prototypes
void go_TopMenu();
void go_CreateAccount(string &username, string &password);
void get_LogIn(string &username, string &password);
//void go_BankMenu();
//float get_Withdraw();
////float get_Deposit();
//void get_Balance();
//void go_Quit();





int main()
{
	go_TopMenu();
	system("pause");
	return 0;
}

void go_TopMenu()
{
	int sel1; //go_Create
	sel1 = 0;
	cout << "Welcome to bank of banking" << endl;
	cout << "1 to create account" << endl;
	cout << "2 to Log in" << endl;
	cout << "any other key to exit program" << endl;
	cin >> sel1;
	string create, login, quit,username,password;
	if (sel1 == 1) go_CreateAccount(username,password);
	else if (sel1 == 2) get_LogIn(username, password);
	

}

void go_CreateAccount(string &username, string &password)
{
	

		cout << "Please enter a user name for your account" << endl;
		cin >> username;
		cout << "your account username is: " << username << endl;
	cout << "Please enter a password for your account" << endl;
	cin >> password;
	go_TopMenu();


}

void get_LogIn(string &username, string &password)
{
	string input1;
	string input2;

	cout << "Please Enter User Name" << endl;
	cin >> input1;
	cout << "Please Enter Password" << endl;
	cin >> input2;
	if (username == input1 & password == input2)
		cout << "correct" << endl;


		
}