Add some simple debug print stmts.

adapters/google.py

@@ -29,8 +29,11 @@ class Google():
         self.credentials = None
 
     def login(self):
+        print('token_file =', self.token_file)
+        print('exists?', os.path.exists(self.token_file))
         if os.path.exists(self.token_file):
             self.credentials = Credentials.from_authorized_user_file(self.token_file, SCOPES)
+        print('valid?', self.credentials.valid)
         if self.credentials is None or not self.credentials.valid:
             if self.credentials is not None \
                     and self.credentials.expired \