User Data Validator

You are given a JSON array of users via standard input. Each user is represented as a JSON object containing three keys: id, name, and email. Your task is to validate this list and separate it into two lists:

1. Valid Users: Users whose email addresses contain the '@' character.
2. Users with Invalid Emails: Users whose email addresses do not contain the '@' character.

If any user object is missing one of the required fields, immediately output an error message with the following format:

Missing field in user data: <field>

and terminate the program.

If all user objects contain the required fields, output the results in two sections. The first section begins with the line "Valid Users:" followed by the JSON array of valid users. After a blank line, the second section should have the line "Users with Invalid Emails:" followed by the JSON array of invalid users.

Note: All outputs must be printed to standard output.

inputFormat

A single line from standard input containing a JSON array of user objects. Each user object has the following format:

{"id": <number>, "name": <string>, "email": <string>}

There are no extra spaces or line breaks within the JSON objects.

outputFormat

If any user object is missing a required field, output a single line with the error message:

Missing field in user data: <missing_field>

Otherwise, output exactly the following format:

Valid Users:
<JSON array of valid users>

Users with Invalid Emails:
<JSON array of invalid users>

Make sure to print to standard output (stdout).## sample

[{"id": 1, "name": "John Doe", "email": "john.doe@example.com"}, {"id": 2, "name": "Jane Smith", "email": "jane.smith@example.com"}]

Valid Users:
[{"id": 1, "name": "John Doe", "email": "john.doe@example.com"}, {"id": 2, "name": "Jane Smith", "email": "jane.smith@example.com"}]
Users with Invalid Emails:
[]

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