def login():
login_screen = Toplevel(main_screen)
login_screen.title("Login")
login_screen.geometry("300x250")
Label(login_screen, text="Please enter details below to login").pack()
Label(login_screen, text="").pack()
global username_verify
global password_verify
username_verify = StringVar()
password_verify = StringVar()
Label(login_screen, text="Username * ").pack()
username_login_entry = Entry(login_screen, textvariable=username_verify)
username_login_entry.pack()
Label(login_screen, text="").pack()
Label(login_screen, text="Password * ").pack()
password__login_entry = Entry(login_screen, textvariable=password_verify, show= '*')
password__login_entry.pack()
Label(login_screen, text="").pack()
Button(login_screen, text="Login", width=10, height=1, command=login_verification).pack()