Unless your Wi-Fi has been set to Open, all users connecting to Wi-Fi would need to know the password.
Wi-Fi broadcasts are public so and device going passed can see the Wi-Fi and the eero may detect a connect request from a device but this would then be refused if the correct password was not submitted. This is the normal workings of Wi-Fi connections.
Please log in to My Account if you need to view or pay your bill, manage boosts and track your usage. From My Account you can also check your connection and test your line for any issues in the Service Centre.
