delete activation code before sending email to avoid any delay

app/auth/views/activate.py

@@ -47,7 +47,6 @@ def activate():
     user = activation_code.user
     user.activated = True
     login_user(user)
-    email_utils.send_welcome_email(user)
 
     # activation code is to be used only once
     ActivationCode.delete(activation_code.id)
@@ -55,6 +54,8 @@ def activate():
 
     flash("Your account has been activated", "success")
 
+    email_utils.send_welcome_email(user)
+
     # The activation link contains the original page, for ex authorize page
     if "next" in request.args:
         next_url = request.args.get("next")