def update(client_id, key, value)
      @clients.each do |hash|
        if hash[:client_id] == client_id
          hash[key] = value
        end
      end
    end
def update(client_id, key, value)
      @clients.each do |hash|
        if hash[:client_id] == client_id
          hash[key] = value
        end
      end
    end
Store client specific data in a {Hash}
 @param client_id [Integer] ID of client
 @param key [String|Symbol]
 @param value What the key should equal