diff --git a/models.py b/models.py
index fc464bb..93e2564 100644
--- a/models.py
+++ b/models.py
@@ -1,7 +1,13 @@
 from typing import Any
+from uuid import UUID
 from pydantic import BaseModel
 
 
+class AuthModel(BaseModel):
+    username: str
+    password: str
+
+
 class ItemsFieldSelectorList(BaseModel):
     fields: list[str] = []
 
@@ -24,3 +30,19 @@ class ColumnDefinition(BaseModel):
 
 class ItemDeletionDefinitionList(BaseModel):
     defs: list[ColumnDefinition]
+
+
+class TableDefinition(BaseModel):
+    table_id: UUID
+    table_name: str
+    columns: str
+    system: bool
+    hidden: bool
+
+
+class TableListDefinition(BaseModel):
+    tables: list[TableDefinition]
+
+
+class ErrorResponseDefinition(BaseModel):
+    error: str