Put new user form behind env var defaulted to true

src/login.py

@@ -1,4 +1,5 @@
 import json
+import os
 import pandas as pd
 import re
 import streamlit as st
@@ -6,6 +7,8 @@ from streamlit_gsheets import GSheetsConnection
 from streamlit.runtime.secrets import AttrDict, secrets_singleton
 from data_storage import get_user_id_if_email_exists, get_user, add_new_user, create_new_token_for_user
 
+NEW_USER_ENABLED = bool(int(os.getenv("NEW_USER_ENABLED", 1)))
+
 
 class HFFriendlyGSheetsConnection(GSheetsConnection):
     # HF doesnt currently support nested secrets as in secrets.toml
@@ -56,13 +59,14 @@ def new_user_form():
     if st.button("Existing User get Login link"):
         existing_user_new_token()
     else:
-        """Form to collect new user information and submit"""
-        with st.form("New User Registration"):
-            st.header("New User Registration")
-            st.write("After submitting, a url to login will be emailed to you.")
-            st.text_input("Email Address", key="new_user_email")
-            st.text_input("Name", key="new_user_name")
-            st.form_submit_button("Submit", on_click=new_user_submitted)
+        if NEW_USER_ENABLED:
+            """Form to collect new user information and submit"""
+            with st.form("New User Registration"):
+                st.header("New User Registration")
+                st.write("After submitting, a url to login will be emailed to you.")
+                st.text_input("Email Address", key="new_user_email")
+                st.text_input("Name", key="new_user_name")
+                st.form_submit_button("Submit", on_click=new_user_submitted)
 
 
 def existing_user_new_token():