A server comprises a communications module; a processor coupled with the communications module; and a memory coupled to the processor and storing processor-executable instructions which, when executed by the processor, configure the processor to receive, via the communications module and from a computing device, a signal representing a request to add an authorized user to an account of an entity hosted by a first institution associated with the server; send, via the communications module and to a second server associated with a second institution hosting an account of the authorized user, a signal that includes a unique key and an identifier of the entity, the signal causing the second server to store the unique key and the identifier in memory and associating the unique key and the identifier with the account of the authorized user; receive a signal representing a request to perform an operation for the entity; in response to receiving the request to perform the operation, send, via the communications module and to a digital identity network, a request for a unique key associated with the entity; receive, via the communications module and from the digital identity network, the unique key; and in response to receiving the unique key, perform the operation.