Register program

from tkinter import *
from tkinter import ttk
import sqlite3
from tkinter.filedialog import askopenfilename

gui=Tk()
Tk().withdraw()


User=StringVar()
Password=StringVar()
def database():
    username=User.get()
    password=Password.get()
    conn = sqlite3.connect('INFO.db')
    with conn:
        cursor=conn.cursor()
    cursor.execute('CREATE TABLE IF NOT EXISTS Student (User TEXT, Password TEXT)')
    cursor.execute('INSERT INTO Student(User,Password) VALUES(?,?)',(username, password))
    conn.commit()


def login():
    if entry in database:           #The error is here
        filename=askopenfilename('parole.txt')
        print(filename)
    else:
        error = Label(gui, text='WRONG INFO', bg='red', fg='dark red').grid(x=190,y=190)

# @@@@@@@@@@@@ INFO REGISTER @@@@@@@@@@@@@@@@@@
def label():
    a = Label(gui,
              text='Username: ',
              fg='cyan',
              bg='dark blue').grid(row=0,column=0)

    b = Label(gui,
              text='Password: ',
              fg='cyan',
              bg='dark blue').grid(row=1,column=0)

label()

#    @@@@@@@@@@@@@@@  INPUT      @@@@@@@@@@@@@@@@@@@
def entry():
    a1 = Entry(gui, bg='light grey', fg='black').grid(row=0,column=1)
    b1 = Entry(gui, bg='light grey', fg='black').grid(row=1,column=1)

entry()
# Make sure fist is capital and second is not
gui. title("First title")


#    @@@@@@@@@@@@@@@ BUTTONS    @@@@@@@@@@@@@@@@@@@@@@
log = Button(gui, text='Log In', relief=RAISED, command=login).grid(row=2, column=0)
register = Button(gui, text='Register', relief=RAISED, command=database).grid(row=2, column=1)


gui.geometry('400x400')
gui.configure(bg="black")
gui.mainloop()