vendor features for admin and vendor admin area

models/schema/auth.py

@@ -31,6 +31,7 @@ class UserRegister(BaseModel):
 class UserLogin(BaseModel):
     username: str = Field(..., description="Username")
     password: str = Field(..., description="Password")
+    vendor_code: Optional[str] = Field(None, description="Optional vendor code for context")
 
     @field_validator("username")
     @classmethod