{
  "message": "success",
  "data": {
    "username": {
      "minLength": 4,
      "maxLength": 16,
      "pattern": "^[a-zA-Z0-9][a-zA-Z0-9_-]*$",
      "description": "用户名只能包含字母、数字、下划线和横杠"
    },
    "nickname": {
      "minLength": 2,
      "maxLength": 12,
      "pattern": "^[\\u4e00-\\u9fa5a-zA-Z0-9_-]*$",
      "description": "昵称可以包含中文、字母、数字、下划线和横杠"
    },
    "password": {
      "minLength": 8,
      "maxLength": 20,
      "requireNumber": true,
      "requireLowercase": true,
      "requireUppercase": true,
      "requireSpecial": true,
      "specialChars": "!@#$%^&*",
      "description": "密码必须包含大小写字母、数字和特殊字符"
    },
    "email": {
      "pattern": "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$",
      "description": "请输入有效的电子邮件地址",
      "allowedDomains": [
        "gmail.com",
        "outlook.com",
        "qq.com",
        "163.com",
        "126.com"
      ]
    },
    "registration": {
      "enabled": true,
      "requireEmailVerification": false,
      "maxAttemptsPerIP": 5,
      "cooldownMinutes": 60,
      "blockedUsernames": [
        "admin",
        "root",
        "system",
        "administrator"
      ]
    }
  },
  "retcode": 0
}