getContacts
Retrieves all contacts that match the given msisdnNumbers.
Returns a HubPayload which encapsulates the outcome. In case it is successful the value is the resulted list of contacts or the error if it is failure.
Retrieves a stream of contacts that match the given msisdnNumbers.
Returns a stream of HubPayload which encapsulates the outcome. In case it is successful the value is the resulted Contact or the error if it is failure.