Update app.py

app.py

@@ -46,7 +46,7 @@ def login():
     if st.button("Login"):
         if username in col.find():
             if password in col.find():
-                st.session_state.userr = username
+                st.session_state.user = username
                 st.experimental_rerun()
             else:
                 st.error("Incorrect password")