Support demo users

app/pages/settings.py

@@ -2,19 +2,17 @@ import streamlit as st
 
 import queries.crud as crud
 import themes as th
-
-is_login_enabled = hasattr(st, 'user') and hasattr(st.user, 'is_logged_in')
-is_logged_in = is_login_enabled and st.user.is_logged_in
+from user import is_logged_in, is_login_enabled
 
 st.title("Settings")
-if hasattr(st.session_state, 'user_name'):
+if hasattr(st.session_state, 'user_name') and st.session_state.user_name:
     st.markdown(f"Currently logged in as **{st.session_state.user_name}**")
 
 
 st.header("Theme")
 themes = st.session_state.themes
 with st.container(horizontal=True, width="stretch"):
-    for theme in ["light", "dark"]:
+    for theme in themes.keys():
         if st.button(label=themes[theme]["button_face_label"],
                  icon = themes[theme]["button_face_icon"],
                  disabled = (theme == st.session_state.current_theme),
@@ -61,8 +59,9 @@ with st.container(key="settings-color-selector"):
                 """, width=400)
 
 
-st.header("Actions")
-with st.container():
-    if is_logged_in:
-        if st.button("Logout", icon=":material/logout:", width="stretch"):
-            st.logout()
+if is_login_enabled():
+    st.header("Actions")
+    with st.container():
+        if is_logged_in():
+            if st.button("Logout", icon=":material/logout:", width="stretch"):
+                st.logout()