aws_lambda_powertools/utilities/data_classes/s3_object_event.py [100:115]:
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    @property
    def user_name(self) -> str:
        """The friendly name of the user or role that issued the session."""
        return self["userName"]

    @property
    def principal_id(self) -> str:
        """The internal ID of the entity that was used to get credentials."""
        return self["principalId"]

    @property
    def arn(self) -> str:
        """The ARN of the source (account, IAM user, or role) that was used to get temporary security credentials."""
        return self["arn"]

    @property
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aws_lambda_powertools/utilities/data_classes/s3_object_event.py [196:216]:
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    @property
    def user_name(self) -> str:
        """The friendly name of the identity that made the call."""
        return self["userName"]

    @property
    def principal_id(self) -> str:
        """The unique identifier for the identity that made the call.

        For requests made with temporary security credentials, this value includes
        the session name that is passed to the AssumeRole, AssumeRoleWithWebIdentity,
        or GetFederationToken API call."""
        return self["principalId"]

    @property
    def arn(self) -> str:
        """The ARN of the principal that made the call.
        The last section of the ARN contains the user or role that made the call."""
        return self["arn"]

    @property
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