colab: print account when instantiating the gist

src/colab/colab.py

@@ -23,7 +23,7 @@ class ColabGist(Thread):
 
         self.refresh_event = Event()
         self.stop_event = Event()
-        print("[ColabGist {}] New Colab Gist Thread created!".format(self.url))
+        print("[ColabGist {}] New Colab Gist Thread created! Using account {} ".format(self.url, self.account))
 
     def run(self):
         self.run_colab()