1. A method comprising: receiving, from a client device, a first request to access a database system, the first request including authentication information of a user of the database system and information identifying the client device; validating the authentication information of the user; responsive to validating the authentication information of the user, determining whether the information identifying the client device is associated with a user account associated with the authentication information based at least in part on stored information associated with a plurality of client devices; and responsive to determining that the information identifying the client device is not associated with the user account associated with the authentication information: sending a token to an electronic location associated with the user account, receiving, from the client device, a second request to access the database system, the second request including the token sent to the electronic location associated with the user account, and responsive to receiving the token from the client device, granting the client device access to the database system.