Login cookies are generated once the user has registered or subsequently logged in and are used to identify them in the services for the following purposes: Keep the user identified so that if they close a service, the browser, or the computer and later return to said service another time or day, they will still be identified, facilitating their navigation without having to log in again. This functionality can be suppressed if the user clicks the [logout] functionality, so that this cookie is deleted and the next time the user enters the service they will have to log in to be identified. Check if the user is authorized to access certain services, for example, to participate in a contest. Additionally, some services may use connectors to social networks such as Facebook or Twitter. When the user registers for a service with credentials from a social network, they authorize the social network to save a persistent cookie that remembers their identity and guarantees access to the services until it expires. The user can delete this cookie and revoke access to services through social networks by updating their preferences in the specific social network.