Use this endpoint to check if the email is already registered in Omnyfy. Return false if the email has already been used inside Omnyfy. If it returns true, you can use the email to register the customer.
Sample Curl
curl --location 'https://mygatewayurl.com/V1/customer/is-email-available' --header 'Content-Type: application/json' --data-raw '{ "customerEmail ": "[email protected] " }'