RestClient::ResourceNotFound in UsersController#index

Hi,

I am trying to implement Rest Api for a sample application for learning
purpose. But when I try to make a “GET” request through the RestClient
it
is showing error as

RestClient::ResourceNotFound in UsersController#index

def index
uri = “#{API_BASE_URL}/users.json” # specifying json format in the
URl
rest_resource = RestClient::Resource.new(uri, USERNAME, PASSWORD) #
It
will create new rest-client resource so that we can call different
methods
of it
users = rest_resource.get
@users = JSON.parse(users, :symbolize_names => true) # we will
convert
the return data into array of hash.see json data parsing here
end

Please help.