build(auth.py): adding email / magic link based login for proxy ui

ui/auth.py

@@ -0,0 +1,39 @@
+"""
+Auth in user, to proxy ui. 
+
+Uses supabase passwordless auth: https://supabase.com/docs/reference/python/auth-signinwithotp
+
+Remember to set your redirect url to 8501 (streamlit default).
+"""
+import streamlit as st
+from dotenv import load_dotenv
+load_dotenv()
+import os
+from supabase import create_client, Client
+
+# Set up Supabase client
+url: str = os.environ.get("SUPABASE_URL")
+key: str = os.environ.get("SUPABASE_KEY")
+supabase: Client = create_client(url, key)
+
+
+def sign_in_with_otp(email: str):
+    data = supabase.auth.sign_in_with_otp({"email": email})
+    # Redirect to Supabase UI with the return data
+    st.write(f"Please check your email for a login link!")
+    
+
+# Create the Streamlit app
+def main():
+    st.title("User Authentication")
+
+    # User email input
+    email = st.text_input("Enter your email")
+
+    # Sign in button
+    if st.button("Sign In"):
+        sign_in_with_otp(email)
+
+
+if __name__ == "__main__":
+    main()