Request:
This is a GET request. You can search for a contact by either phone number or email address, but not both at the same time. Here are the accepted query parameters:

• email (Optional): The email address of the contact you want to retrieve.
• phoneNumber (Optional): The phone number of the contact you want to retrieve. Include the country code without the plus sign (e.g., "1234567890" for a US number).

Additional Notes:

• You cannot search for a contact using both phone number and email at the same time. Only provide one or the other parameter in your request.
• If the phone number is provided, it will be formatted by adding a plus sign "+" before the country code for internal processing.