A method implemented by one or more processors, the method comprising: receiving a spoken utterance from a user that is associated with a first computing device, wherein the spoken utterance is received at a second computing device that is in a common environment with the first computing device and the user, and wherein each of the first computing device and the second computing device provide access to a respective automated assistant; providing, by the second computing device to the first computing device, a first request for the first computing device to confirm that the user is authenticated with the first computing device, wherein the first request embodies an authentication value that is accessible to one or more devices that are authenticated with the user; when the first computing device is able to access the authentication value: receiving, by the second computing device, authentication data that indicates to the second computing device that the first computing device is able to access the authentication value; providing, by the second computing device and based on the first computing device being able to access the authentication value, a second request for the first computing device to provide user preference data for responding to one or more assistant requests embodied in the spoken utterance; receiving, by the second computing device and responsive to providing the second request, the user preference data that identifies one or more user preferences to be adopted by an automated assistant of the second computing device when responding to the one or more assistant requests submitted by the user; and causing, by the second computing device, one or more interfaces of the second computing device to render an automated assistant output that is based on the user preference data. receiving a spoken utterance from a user that is associated with a first computing device, wherein the spoken utterance is received at a second computing device that is in a common environment with the first computing device and the user, and wherein each of the first computing device and the second computing device provide access to a respective automated assistant; wherein the spoken utterance is received at a second computing device that is in a common environment with the first computing device and the user, and wherein each of the first computing device and the second computing device provide access to a respective automated assistant; providing, by the second computing device to the first computing device, a first request for the first computing device to confirm that the user is authenticated with the first computing device, wherein the first request embodies an authentication value that is accessible to one or more devices that are authenticated with the user; request for the first computing device to confirm that the user is authenticated with the first computing device, wherein the first request embodies an authentication value that is accessible to one or more devices that are authenticated with the user; when the first computing device is able to access the authentication value: receiving, by the second computing device, authentication data that indicates to the second computing device that the first computing device is able to access the authentication value; providing, by the second computing device and based on the first computing device being able to access the authentication value, a second request for the first computing device to provide user preference data for responding to one or more assistant requests embodied in the spoken utterance; receiving, by the second computing device and responsive to providing the second request, the user preference data that identifies one or more user preferences to be adopted by an automated assistant of the second computing device when responding to the one or more assistant requests submitted by the user; and causing, by the second computing device, one or more interfaces of the second computing device to render an automated assistant output that is based on the user preference data. receiving, by the second computing device, authentication data that indicates to the second computing device that the first computing device is able to access the authentication value; providing, by the second computing device and based on the first computing device being able to access the authentication value, a second request for the first computing device to provide user preference data for responding to one or more assistant requests embodied in the spoken utterance; receiving, by the second computing device and responsive to providing the second request, the user preference data that identifies one or more user preferences to be adopted by an automated assistant of the second computing device when responding to the one or more assistant requests submitted by the user; and causing, by the second computing device, one or more interfaces of the second computing device to render an automated assistant output that is based on the user preference data.