Set the credentials before test runs

spec/beef/api/auth_rate_spec.rb

@@ -10,6 +10,8 @@ RSpec.describe 'BeEF API Rate Limit' do
 		# Note: rake spec passes --patterns which causes BeEF to pickup this argument via optparse. I can't see a better way at the moment to filter this out. Therefore ARGV=[] for this test.
 		ARGV = []
 		@config = BeEF::Core::Configuration.instance
+		@config.set('beef.credentials.user', "beef")
+		@config.set('beef.credentials.passwd', "beef")
 		http_hook_server = BeEF::Core::Server.instance
 		http_hook_server.prepare
 		@pids = fork do