diff --git a/obsidian_import/__init__.py b/obsidian_import/__init__.py
index 418f9b2..6ee0e0c 100644
--- a/obsidian_import/__init__.py
+++ b/obsidian_import/__init__.py
@@ -308,7 +308,8 @@ def import_data(obsidian_path: Path, dry_run=True):
             )
             continue
         rows = load_csv_file(
-            import_def['path'], sniff=not import_def.get('standard_variant'),
+            import_def['path'],
+            sniff=not import_def.get('standard_variant'),
         )
         logger.info('Loaded CSV with %d lines', len(rows))
         num_files_updated = import_def['import_rows'](vault, rows)
diff --git a/personal_data/fetchers/wanikani_lessons.py b/personal_data/fetchers/wanikani_lessons.py
index 7d38df0..4c44115 100644
--- a/personal_data/fetchers/wanikani_lessons.py
+++ b/personal_data/fetchers/wanikani_lessons.py
@@ -5,19 +5,16 @@ from collections.abc import Iterator, Mapping
 
 import requests
 
-# Import the base Scraper class; adjust the import if your code structure differs.
-from personal_data.data import Scraper
+from .. import secrets
+from personal_data.data import DeduplicateMode, Scraper
 
 logger = logging.getLogger(__name__)
 
 
 @dataclasses.dataclass(frozen=True)
 class WaniKaniLessonsFetcher(Scraper):
-    api_token: str
-
-    @staticmethod
-    def dataset_name() -> str:
-        return 'wanikani_lessons'
+    dataset_name = 'wanikani_lessons'
+    deduplicate_mode = DeduplicateMode.BY_ALL_COLUMNS
 
     def scrape(self) -> Iterator[Mapping[str, object]]:
         """
@@ -26,30 +23,13 @@ class WaniKaniLessonsFetcher(Scraper):
         """
         url = 'https://api.wanikani.com/v2/assignments'
         headers = {
-            'Authorization': f'Bearer {self.api_token}',
+            'Authorization': f'Bearer {secrets.wanikani_api_key()}',
             'Wanikani-Revision': '20170710',
         }
-        response = requests.get(url, headers=headers)
-        if response.status_code != 200:
-            logger.error('Error retrieving assignments: %s', response.text)
-            return
+        response = self.session.get(url, headers=headers)
+        response.raise_for_status()
         data = response.json()
-        # Check that 'data' key exists in the JSON response.
-        assignments = data.get('data', [])
-        for assignment in assignments:
-            assignment_data = assignment.get('data', {})
-            # Only yield if unlocked_at is available.
-            unlocked_at = assignment_data.get('unlocked_at')
-            if unlocked_at:
-                # Convert unlocked_at ISO8601 string (assume 'Z' for UTC) to a datetime object.
-                try:
-                    dt = datetime.datetime.fromisoformat(
-                        unlocked_at.replace('Z', '+00:00'),
-                    )
-                except Exception as e:
-                    logger.error("Error parsing unlocked_at '%s': %s", unlocked_at, e)
-                    continue
-                yield {
-                    'subject_id': assignment_data.get('subject_id'),
-                    'unlocked_at': dt,
-                }
+        for assignment in data.get('data', []):
+            data = assignment['data']
+            print(data)
+            yield data
diff --git a/personal_data/main.py b/personal_data/main.py
index 30e916e..871c43f 100644
--- a/personal_data/main.py
+++ b/personal_data/main.py
@@ -97,7 +97,9 @@ def get_cookiejar(use_cookiejar: bool):
         cookiejar = browsercookie.firefox()
         if len(cookiejar) > 10:
             return cookiejar
-        browsercookie.firefox(['/home/jmaa/.cachy/mbui5xg7.default-release/cookies.sqlite'])
+        browsercookie.firefox(
+            ['/home/jmaa/.cachy/mbui5xg7.default-release/cookies.sqlite'],
+        )
         if len(cookiejar) > 10:
             return cookiejar
     logger.warning('No cookiejar is used')
diff --git a/personal_data/secrets.py b/personal_data/secrets.py
index d099911..e8f81a6 100644
--- a/personal_data/secrets.py
+++ b/personal_data/secrets.py
@@ -71,3 +71,7 @@ JELLYFIN_PASSWORD = secrets.load('JELLYFIN_PASSWORD')
 WITHINGS_CLIENTID = secrets.load('WITHINGS_CLIENTID')
 WITHINGS_SECRET = secrets.load('WITHINGS_SECRET')
 WITHINGS_CALLBACK_URI = secrets.load('WITHINGS_CALLBACK_URI')
+
+# Other
+def wanikani_api_key():
+    return secrets.load_or_fail('WANIKANI_API_KEY')