1. A system for providing access to a private resource in an enterprise social networking system, the system comprising: a database system implemented using a server system comprising one or more physical processors, the database system configurable to cause: displaying, in a user interface on a display of a device, a publisher configurable to publish feed items to a feed of the enterprise social networking system, the feed being dedicated to the private resource, the private resource and the feed being accessible to only authorized users of the enterprise social networking system identifiable as having access to the private resource, the publisher comprising: an input area configurable to receive text, and a first selection operable to share the text in the feed as a feed item; automatically detecting entry, in the input area of the publisher, of a user identification (ID) identifying a first user of the enterprise social networking system; automatically determining, responsive to detecting the entry of the user ID, that the first user is unauthorized to access the private resource; displaying, in the user interface and responsive to automatically determining that the first user is unauthorized to access the private resource, a message comprising: a notification that the first user is unauthorized to access e private resource, and a second selection operable to send, to an authorized administrator associated with the private resource, a request to grant the first user access to the private resource determining that the second selection has been selected; and displaying, on a display of a device of the authorized administrator and responsive to determining that the second selection has been selected, input controls configurable to receive input from the authorized administrator to grant the first user access to the private resource.