1. A telepresence system comprising: a memory configured to store computer executable instructions; and one or more processors coupled to the memory, the processors configured, when executing the instructions, to: receive a video stream from a client via a video cable, the video stream including an image generated by the client; determine that the image includes a matrix barcode; decode the matrix barcode into text, the text specifying user credentials of a user associated with the client; and provision the telepresence system for the client in response to a determination that the user credentials are valid.