Thank you for replying.
My challenge is that the admin and dashboard routes are not structurally different from the username routes.
That’s why I wanted to add the @ and # symbol so that those particular routes are differentiated and I can have custom core that runs only if such routes are entered.
For now I have, a structure below which achieves the differentiation and allows me run the custom code.
FlowRouter.route('/in/:username', {
// options
});
But I still want to be able to do
FlowRouter.route('/@username', {
// options
});
So that any route with @ symbol is treated as a user profile route and I run custom code for that.