OG username helper

This module try to help Organic Groups(OG) administrators to add site users to their OG by providing an autocomplete input(like the one you can see editing core node user author).

This module start as a patch for OG: #225308: More convenient way to add users

And almost 2 years after, it seem to be a good idea to maintain it as a separate module.

For D7 take a look to Organic Groups Mass Add.