A method may include receiving an indication that a user has authenticated at a physical authentication location, the user associated with a user profile and a user identifier; querying a database using the user identifier as input to determine if the user profile has an online user account of an online service; determining, based on the querying, that the user profile does not have an online user account of the online service; based on the determining, generating a 2D barcode encoded with a link to open a credential creation user interface on a computing device; receiving an indication of activation of the link from the computing device; and in response to the receiving, presenting on the computing device the credential creation user interface configured to receive a username and password for a new online user account of the online service.