Filled delete.py and created change.py

src/database/delete.py

@@ -0,0 +1,18 @@
+import sqlmodel
+from sqlalchemy.future import Engine
+
+from . import models
+
+
+def purge_accounts(engine: Engine, user_id: int) -> None:
+    statement = sqlmodel.delete(models.Account).where(models.Account.user_id == user_id)
+    with sqlmodel.Session(engine) as session:
+        session.exec(statement)
+
+
+def delete_master_pass(engine: Engine, user_id: int) -> None:
+    statement = sqlmodel.delete(models.MasterPass).where(
+        models.MasterPass.user_id == user_id
+    )
+    with sqlmodel.Session(engine) as session:
+        session.exec(statement)