Methods, systems, apparatuses, and computer-readable media for providing enhanced user authentication functionalities are presented. In one or more embodiments, a server computing device may authenticate a user of a user computing device to a customer portal. Subsequently, the server computing device may receive a click-to-call request from the user computing device. In response to receiving the click-to-call request, the server computing device may generate a one-time passcode for the user. Then, the server computing device may provide the one-time passcode to the user. Thereafter, the server computing device may receive one-time-passcode input from an interactive voice response (IVR) server, and such input may be received from a caller. The server computing device then may validate the one-time-passcode input based on the one-time passcode provided to the user. In response to validating the one-time-passcode input, the server computing device may cause the IVR server to authenticate the caller as the user.