see

app.py

@@ -26,23 +26,35 @@ voters = [
     "volunteer-5",
 ]
 
-# read all the environment variables
-st.write("Environment variables")
-# read environment variable named app_password
-st.write(os.environ.get("app_password"))
-
+# login page
 with st.form("images"):
+    username = st.text_input("Username")
+    password = st.text_input("Password", type="password")
+    submitted = st.form_submit_button("Login")
 
-    st.write("Inside the form")
-    slider_val = st.slider("How fat")
 
-    password = st.text_input("Password", type="password")
 
-    # select voter from the list
-    username = st.selectbox("Select voter", voters)
+if submitted:
+    if not password == os.environ.get("app_password"):
+        st.error("The password you entered is incorrect")
+        st.stop()
+    else:
+        st.success("Welcome, " + username)
+        st.write("You are now logged in")
+
+    with st.form("images"):
+
+        st.write("Inside the form")
+        healthiness = st.slider("How healthy is this picture?", 0, 100, 50)
+        fat_level = st.slider("How fat are you", 0, 100, 50)
+        muscle_level = st.slider("How muscular are you?", 0, 100, 50)
+        password = st.text_input("Password", type="password")
+
+        # select voter from the list
+        username = st.selectbox("Select voter", voters)
 
-    # Every form must have a submit button.
-    submitted = st.form_submit_button("Submit")
-    if submitted:
-        st.write("slider", slider_val, "checkbox", checkbox_val)
-st.write("Outside the form")
+        # Every form must have a submit button.
+        submitted = st.form_submit_button("Submit")
+        if submitted:
+            st.write("slideers", healthiness, fat_level, muscle_level)
+    st.write("Outside the form")