use game hashtag from config

app/Listeners/TweetAcceptedListener.php

@@ -39,7 +39,7 @@ class TweetAcceptedListener implements ShouldQueue
         $newMissionStatus = $tweet->mission->complete($tweet->team);
         if($event->previousMissionStatus == false && $newMissionStatus == true) {
 
-            $text = 'Team '.$tweet->team->name.' completed mission '.$tweet->mission_id.'! '.$tweet->mission->hashtag.' #spy30';
+            $text = 'Team '.$tweet->team->name.' completed mission '.$tweet->mission_id.'! '.$tweet->mission->hashtag.' '.env('GAME_HASHTAG');
             Log::info("Tweeting: $text");
 
             $params = [
@@ -63,7 +63,7 @@ class TweetAcceptedListener implements ShouldQueue
                 ->where('m2_transit_center_id', $this_tc)
                 ->count();
             if($other_teams == 0) {
-                $text = 'Team '.$tweet->team->name.' is currently the only team to have visited '.$tweet->transit_center->name.'! #spy30';
+                $text = 'Team '.$tweet->team->name.' is currently the only team to have visited '.$tweet->transit_center->name.'! '.env('GAME_HASHTAG');
                 Log::info("Tweeting: $text");
                 $params = [
                     'attachment_url' => 'https://twitter.com/'.$tweet->player->twitter.'/status/'.$tweet->tweet_id,