Implement invite link command

src/main/java/wtf/beatrice/hidekobot/Configuration.java

@@ -12,6 +12,11 @@ public class Configuration
     // todo: allow people to set their own user id
     private static final long botOwnerId = 979809420714332260L;
 
+    private final static String defaultInviteLink =
+            "https://discord.com/api/oauth2/authorize?client_id=%userid%&scope=bot+applications.commands&permissions=8";
+
+    private static String botUserId = "";
+
 
     /**
      * Checks if the bot has been started with the verbose argument.
@@ -54,4 +59,15 @@ public class Configuration
      */
     public static long getBotOwnerId() { return botOwnerId; }
 
+    public static void seBotUserId(String id)
+    {
+        botUserId = id;
+    }
+
+    public static String getBotUserId() { return botUserId; }
+
+    public static String getInviteUrl() {
+        return defaultInviteLink.replace("%userid%", botUserId);
+    }
+
 }