fix: Check if we have the SERVER_MEMBERS intent before fetching serve…

…r members (#53)

lib/discordrb/data/server.rb

@@ -143,10 +143,15 @@ def member(id, request = true)
     end
 
     # @return [Array<Member>] an array of all the members on this server.
+    # @raise [RuntimeError] if the bot was not started with the :server_member intent
     def members
       return @members.values if @chunked
 
       @bot.debug("Members for server #{@id} not chunked yet - initiating")
+
+      # If the SERVER_MEMBERS intent flag isn't set, the gateway won't respond when we ask for members.
+      raise 'The :server_members intent is required to get server members' if (@bot.gateway.intents & INTENTS[:server_members]).zero?
+
       @bot.request_chunks(@id)
       sleep 0.05 until @chunked
       @members.values

lib/discordrb/gateway.rb

@@ -143,6 +143,9 @@ class Gateway
     # @return [true, false] whether or not this gateway should check for heartbeat ACKs.
     attr_accessor :check_heartbeat_acks
 
+    # @return [Integer] the intent parameter sent to the gateway server.
+    attr_reader :intents
+
     def initialize(bot, token, shard_key = nil, compress_mode = :stream, intents = ALL_INTENTS)
       @token = token
       @bot = bot