when i select in or out something in filter or selected some think in selected box it return the login page

Question

I'm want to stay in page and not return in login page,How can i do

This is login code:

if selected == "Annual Report":
    username_placeholder = st.empty()
    password_placeholder = st.empty()
    username = username_placeholder.text_input("Username")
    password = password_placeholder.text_input("Password", type="password")
    login_button_placeholder = st.empty()
    if login_button_placeholder.button("Log in"):
        if username == VALID_USERNAME and password == VALID_PASSWORD:
            # ลบช่องที่ใส่ username และ password ออก
            username_placeholder.empty()
            password_placeholder.empty()           
            login_button_placeholder.empty()