diff --git a/favro_sync/__main__.py b/favro_sync/__main__.py
index 783ddf9..0aa000e 100644
--- a/favro_sync/__main__.py
+++ b/favro_sync/__main__.py
@@ -1,9 +1,10 @@
 import secret_loader
+import requests_cache
+import tempfile
 
-from .favro_client import FavroClient, SeqId
+from .favro_client import FavroClient, SeqId, OrganizationId
 from .favro_fuse import start_favro_fuse
 
-# Authentication
 
 def main():
     secrets = secret_loader.SecretLoader()
@@ -11,12 +12,15 @@ def main():
     favro_username = secrets.load_or_fail('FAVRO_USERNAME')
     favro_password = secrets.load_or_fail('FAVRO_PASSWORD')
 
-    client = FavroClient(favro_org_id=favro_org_id, favro_username=favro_username, favro_password=favro_password)
-    #card_id = client.get_card_id(SeqId(4714))
-    #description = 'TEST'
-    #client.update_card_description(card_id, description)
+    with tempfile.TemporaryDirectory(prefix='favro_sync-') as tmpdirname:
+        session = requests_cache.CachedSession(tmpdirname + '/http-cache.sqlite', expire_after=360)
 
-    start_favro_fuse(client)
+        client = FavroClient(favro_org_id=OrganizationId(favro_org_id),
+                             favro_username=favro_username,
+                             favro_password=favro_password, session=session)
+
+        client.check_logged_in()
+        start_favro_fuse(client)
 
 if __name__ == '__main__':
     main()
diff --git a/favro_sync/favro_client.py b/favro_sync/favro_client.py
index 386355d..29dacb7 100644
--- a/favro_sync/favro_client.py
+++ b/favro_sync/favro_client.py
@@ -1,5 +1,6 @@
 import requests
 import dataclasses
+import datetime
 from typing import Any
 import functools
 from collections.abc import Iterator
@@ -16,21 +17,73 @@ class SeqId:
 class CardId:
     raw_id: str
 
+@dataclasses.dataclass(frozen=True)
+class CommonId:
+    raw_id: str
+
+@dataclasses.dataclass(frozen=True)
+class UserId:
+    raw_id: str
+
+@dataclasses.dataclass(frozen=True)
+class OrganizationId:
+    raw_id: str
+
 @dataclasses.dataclass(frozen=True)
 class Card:
     card_id: CardId
     seq_id: SeqId
+    common_id: CommonId
+    organization_id: OrganizationId
+    is_archived: bool
+    name: str
+    dependencies: list[None] # TODO
+    tags: list[None] # TODO
+    todo_list_user_id: UserId | None
+    todo_list_completed: bool | None
+    creator_user_id: UserId
+    creation_date: datetime.datetime
+
+    detailed_description: str | None
+
+    # Derived
+
     seq_id_with_prefix: str
-    detailed_description: str
+
+
+    ''' TODO, fieds:
+     'position': -399
+     'listPosition': -399
+
+     'isLane': False
+     'assignments': [{'userId': 'Faieomp8fuS8DrnyP' 'completed': True}]
+     'tasksTotal': 0
+     'tasksDone': 0
+     'attachments': []
+     'customFields':
+     'timeOnBoard': None
+     'timeOnColumns': None
+     'favroAttachments': []
+    '''
 
     @staticmethod
     def from_json(json: dict[str, Any]) -> 'Card':
-        print(json)
         return Card(
                 card_id = CardId(json['cardId']),
-                seq_id = SeqId(json['cardSequentialId']),
-                seq_id_with_prefix = PREFIX + json['cardSequentialId'],
-                detailed_description = json['detailedDescription'],
+                seq_id = SeqId(json['sequentialId']),
+                common_id = CommonId(json['cardCommonId']),
+                detailed_description = json.get('detailedDescription'),
+                is_archived = json['archived'],
+                organization_id = OrganizationId(json['organizationId']),
+                name = json['name'],
+                todo_list_user_id = UserId(json['todoListUserId']),
+                todo_list_completed = json['todoListCompleted'],
+                dependencies = json['dependencies'],
+                tags = json['tags'],
+                creator_user_id = UserId(json['createdByUserId']),
+                creation_date = datetime.datetime.fromisoformat(json['createdAt']),
+
+                seq_id_with_prefix = PREFIX + str(json['sequentialId']),
         )
 
 # Endpoints
@@ -40,27 +93,35 @@ URL_UPDATE_CARD = URL_API_ROOT+'/cards/{card_id}'
 
 class FavroClient:
 
-    def __init__(self, *, favro_org_id: str, favro_username: str, favro_password: str,
+    def __init__(self, *, favro_org_id: OrganizationId, favro_username: str, favro_password: str,
                  session: requests.Session | None = None):
+
+        assert favro_org_id is not None
+        assert favro_username is not None
+        assert favro_password is not None
+
         # Setup session
         self.session = session or requests.Session()
-        self.session.auth = (favro_username, favro_username)
+        self.session.auth = (favro_username, favro_password)
         self.session.headers.update({
-                'organizationId': favro_org_id,
+                'organizationId': favro_org_id.raw_id,
                 'content-type': 'application/json',
         })
 
+    def check_logged_in(self) -> None:
+        next(self.get_todo_list_cards())
+
     def get_todo_list_cards(self) -> Iterator[Card]:
         yield from self.get_cards(todo_list=True)
 
 
     def get_cards(self, *, seqid: SeqId | None = None, todo_list=True) -> Iterator[Card]:
         # Determine params for get_cards
-        params = {}
+        params = {'descriptionFormat': 'markdown'}
         if seqid:
-            params['cardSequentialId']= seqid.raw_id
+            params['cardSequentialId']= str(seqid.raw_id)
         if todo_list:
-            params['todoList'] = True
+            params['todoList'] = 'true'
 
         # Run query
         response = self.session.get(URL_GET_ALL_CARDS, params = params)
@@ -75,10 +136,9 @@ class FavroClient:
     def get_card(self, seqid: SeqId) -> Card:
         return next(self.get_cards(seqid=seqid))
 
-    @functools.cache
     def get_card_id(self, seqid: SeqId) -> CardId:
-        json = self.get_card_json(seqid)
-        return CardId(json['cardId'])
+        first_card = next(self.get_cards(seqid = seqid))
+        return first_card.card_id
 
     def update_card_description(self, card_id: CardId, description: str) -> Card:
         """Returns updated Card."""
diff --git a/favro_sync/favro_fuse.py b/favro_sync/favro_fuse.py
index 4f043c6..b66d54f 100644
--- a/favro_sync/favro_fuse.py
+++ b/favro_sync/favro_fuse.py
@@ -46,7 +46,7 @@ class FavroFuse(fuse.Fuse):
         yield fuse.Direntry('..')
 
         for card in self.favro_client.get_todo_list_cards():
-            yield fuse.Direntry(card.seqid_with_prefix)
+            yield fuse.Direntry(card.seq_id_with_prefix)
 
     def open(self, path: str, flags) -> int:
         if path != hello_path: