undefined method `downcase'

[kiote]

Hello.

When I try to call
current_user.twitter.get 'friendships/destroy', {:id => user_id}
or this way
current_user.twitter.get "friendships/destroy?id=#{user_id}"

I catch 'undefined method downcase' for :id:Symbol' or 'undefined methoddowncase' for nil:NilClass'

[iPrash]

the method call is missing a leading slash...
try:
current_user.twitter.get '/friendships/destroy', {:id => user_id}