"""
Authentication schemas for request/response validation.
Simplified for SSO-only authentication.
"""
from pydantic import BaseModel, Field
from datetime import datetime


class UserResponse(BaseModel):
    """User response schema."""
    id: str = Field(..., description="用户ID")
    username: str = Field(..., description="用户名")
    email: str = Field(..., description="邮箱")
    role: str = Field(..., description="用户角色")
    created_at: datetime = Field(..., description="创建时间")

    class Config:
        from_attributes = True