Make create house work

backend/app/models/house.py

@@ -8,4 +8,4 @@ class House(SQLModel, table=True):
     country: str = Field()
     price: float = Field()
     description: str = Field()
-    owner_id: UUID = Field(foreign_key="owner.id")
+    owner_id: UUID = Field(foreign_key="user.id") # TODO consider using owner.id

backend/app/models/user.py

@@ -2,7 +2,6 @@ from sqlmodel import SQLModel, Field
 from uuid import uuid4, UUID
 
 class User(SQLModel, table=True):
-    id: UUID = Field(default_factory=uuid4, primary_key=True)
-    username: str = Field(unique=True, nullable=False)
+    id: UUID = Field(default_factory=lambda: uuid4(), primary_key=True)
     email: str = Field(unique=True, nullable=False)
     password_hash: str = Field(nullable=False)