def deny(from_id, to_id, scope = Amico.default_scope_key)
      return if from_id == to_id

      Amico.redis.multi do
        Amico.redis.zrem("#{Amico.namespace}:#{Amico.pending_key}:#{scope}:#{to_id}", from_id)
        Amico.redis.zrem("#{Amico.namespace}:#{Amico.pending_with_key}:#{scope}:#{from_id}", to_id)
      end
    end
def deny(from_id, to_id, scope = Amico.default_scope_key)
      return if from_id == to_id

      Amico.redis.multi do
        Amico.redis.zrem("#{Amico.namespace}:#{Amico.pending_key}:#{scope}:#{to_id}", from_id)
        Amico.redis.zrem("#{Amico.namespace}:#{Amico.pending_with_key}:#{scope}:#{from_id}", to_id)
      end
    end
Deny a relationship that is pending between two IDs.

 @param from_id [String] The ID of the individual denying the relationship.
 @param to_id [String] The ID of the individual to be denied.
 @param scope [String] Scope for the call.

 Example

   Amico.follow(1, 11)
   Amico.pending?(1, 11) # true
   Amico.deny(1, 11)
   Amico.pending?(1, 11) # false
   Amico.following?(1, 11) #false