Update app.py

app.py

@@ -55,6 +55,10 @@ def login():
 def register():
     st.write("Register")
     username = st.text_input("Email")
+    if validate_email(username):
+        st.success("The email address is valid.")
+    else:
+        st.error("The email address is not valid.")
     password = st.text_input("Password", type="password")
     data = {
         "Username": username,