Add join command.

src/modules/tracker/component.py

@@ -450,3 +450,8 @@ class TrackerComponent(cmds.Component):
             
         else:
             await ctx.reply("Only the broadcaster can enable tracking.")
+
+    @cmds.command(name='join')
+    async def cmd_join(self, ctx: cmds.Context):
+        url = self.bot.get_auth_url()
+        await ctx.reply(f"Invite me to your channel with: {url}")