several changes:

* api calls for auth

* exchange now bind to user

backend/trading_journal/crud.py

@@ -274,9 +274,10 @@ def get_exchange_by_id(session: Session, exchange_id: int) -> models.Exchanges |
     return session.get(models.Exchanges, exchange_id)
 
 
-def get_exchange_by_name(session: Session, name: str) -> models.Exchanges | None:
+def get_exchange_by_name_and_user_id(session: Session, name: str, user_id: int) -> models.Exchanges | None:
     statement = select(models.Exchanges).where(
         models.Exchanges.name == name,
+        models.Exchanges.user_id == user_id,
     )
     return session.exec(statement).first()
 
@@ -286,6 +287,13 @@ def get_all_exchanges(session: Session) -> list[models.Exchanges]:
     return session.exec(statement).all()
 
 
+def get_all_exchanges_by_user_id(session: Session, user_id: int) -> list[models.Exchanges]:
+    statement = select(models.Exchanges).where(
+        models.Exchanges.user_id == user_id,
+    )
+    return session.exec(statement).all()
+
+
 def update_exchange(session: Session, exchange_id: int, update_data: Mapping) -> models.Exchanges:
     exchange: models.Exchanges | None = session.get(models.Exchanges, exchange_id)
     if exchange is None: