diff --git a/masto-mutuals.py b/masto-mutuals.py
index dafbeca..4e77a1e 100644
--- a/masto-mutuals.py
+++ b/masto-mutuals.py
@@ -4,50 +4,73 @@ from mastodon import Mastodon
 import configparser
 import xdg.BaseDirectory
 
+def fetch_user_ids(func, idval=user_id):
+    user_ids = []
+    # This reads like it discards the first page of results, but fetch_remaining includes the
+    # original results as well as the titular "remaining" ones.
+    fetched_users = mastodon.fetch_remaining(func(idval))
+    for user in fetched_users:
+        user_ids.append(user['id'])
+    return user_ids
+
 config_file_path = '%s/masto-mutuals/config.txt' % xdg.BaseDirectory.xdg_config_home
 config = configparser.ConfigParser()
 config.read(config_file_path)
-# TODO: if config file is empty, this should write defaults into a file.
+# TODO: if config file is empty, this should write defaults into the file and throw an errorS
+# correctly.
+
+if not config['ACCOUNT_DATA']['access_token']:
+    print('Error: An access token is required.')
+    exit()
+
+if not config['ACCOUNT_DATA']['instance_url']:
+    print('Error: An instance url is required.')
+    exit()
+
+if config['ACCOUNT_DATA']['list_name']:
+    list_name = config['ACCOUNT_DATA']['list_name']
+else:
+    list_name = 'mutuals'
 
 mastodon = Mastodon(
-    access_token = config['ACCOUNT_DATA']['access_token']
+    access_token = config['ACCOUNT_DATA']['access_token'],
     api_base_url = config['ACCOUNT_DATA']['instance_url']
 )
 
 user_id = mastodon.me()['id']
 
-def fetch_user_ids(func, idval=user_id):
-    user_ids = []
-    initial = True
-    while True:
-        users = func(idval) if initial else mastodon.fetch_next(users)
-        initial = False
-        if users is None or len(users)==0:
-            break
-        for user in users:
-            user_ids.append(user['id'])
-    return user_ids
-
+print("Getting following list.")
 followed_ids = fetch_user_ids(mastodon.account_following)
+print('You follow %s accounts.' % str(len(followed_ids)))
+print("Getting followed list.")
 follower_ids = fetch_user_ids(mastodon.account_followers)
+print('You are followed by %s accounts.' % str(len(follower_ids)))
 mutual_ids = [i for i in followed_ids if i in followed_ids and i in follower_ids]
 
 list_id = None
 for l in mastodon.lists():
-    if l['title'] == 'mutuals':
+    if l['title'] == list_name:
         list_id = l['id']
     if list_id is not None:
         break
 if list_id is None:
-    l = mastodon.list_create('mutuals')
+    l = mastodon.list_create(list_name)
     list_id = l['id']
 
 list_ids = fetch_user_ids(mastodon.list_accounts, idval=list_id)
 toadd_ids = [i for i in mutual_ids if i not in list_ids]
 torm_ids = [i for i in list_ids if i not in mutual_ids]
 
+list_changed = False
 if len(toadd_ids) > 0:
+    list_changed = True
     mastodon.list_accounts_add(list_id, toadd_ids)
 
 if len(torm_ids) > 0:
+    list_changed = True
     mastodon.list_accounts_delete(list_id, torm_ids)
+
+if list_changed:
+    print('%s list updated.' % list_name)
+else:
+    print('%s list unchanged.' % list_name)