diff --git a/src/database/__init__.py b/src/database/__init__.py
index 2b16a00..e4acac3 100644
--- a/src/database/__init__.py
+++ b/src/database/__init__.py
@@ -1,3 +1,3 @@
-from . import add, delete, get, models, prepare
+from . import add, delete, get, models, prepare, change
 
-__all__ = ["add", "delete", "get", "models", "prepare"]
+__all__ = ["add", "delete", "get", "models", "prepare", "change"]
diff --git a/src/database/change.py b/src/database/change.py
new file mode 100644
index 0000000..0941c9a
--- /dev/null
+++ b/src/database/change.py
@@ -0,0 +1,16 @@
+import sqlmodel
+from sqlalchemy.future import Engine
+
+from . import models
+
+
+def change_master_pass(
+    engine: Engine, user_id: int, salt: bytes, passwd: bytes
+) -> None:
+    statement = sqlmodel.update(
+        models.MasterPass,
+        models.MasterPass.user_id == user_id,
+        sqlmodel.values(salt=salt, passwd=passwd),
+    )
+    with sqlmodel.Session(engine) as session:
+        session.exec(statement)
diff --git a/src/database/delete.py b/src/database/delete.py
index e69de29..87a087e 100644
--- a/src/database/delete.py
+++ b/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)