import tkinter as tk
from tkinter import *
def logwrite():
username = txtLog.get()
password = txtPas.get()
with open("logpas.txt", "a+") as f:
f.write("\n{}{}\n".format(username, password))
win = tk.Tk()
win.geometry("300x400")
win.title("Login")
label = tk.Label(win, text="\nUsername", font='Arial')
label.pack()
txtLog = tk.Entry(win)
txtLog.pack()
labelPas = tk.Label(win, text="\nPassword", font='Arial')
labelPas.pack()
txtPas = tk.Entry(win)
txtPas.pack()
label = tk.Label(win, text="\n", font='Arial')
label.pack()
# Добавьте параметр command для указания функции logwrite
btnPas = tk.Button(win, text="Log in", font='Arial', command=logwrite)
btnPas.pack()
btnR = tk.Button(win, text="Registration", font='Arial', command=logwrite)
btnR.pack(expand=1, anchor=SE)
win.mainloop()