getFollowers: Returns the list of user IDs that correspond to a given user's follower
Description
getFollowers connects to the REST API of Twitter and returns the
list of followers of a given user. Note that this function allows the
use of multiple OAuth token to make the process more efficient.
## Not run: # ## Download list of followers of user "p_barbera"# followers <- getFollowers(screen_name="p_barbera", oauth_folder="oauth")# ## End(Not run)