Trying to build a POST request in PHP for username availability, however I'm getting invalid returned results

***FREELANCER STAFF: I AM NOT AUTOMATING ACCOUNT CREATION*** This is for a chrome extension conflict - Kindly do not remove my project. Thank you __________________________________________________________________________ URL for account creation [login to view URL] it then sends ajax POST request to: [login to view URL] JSON submitted: {"email":"------removed-----","confirmedEmail":null,"firstName":null,"lastName":null,"nameOnPlatform":"test1","legalOptinsKey":"ZW4tVVN8NHwyMDIwLTA4LTEzVDE1OjIxOjAxLjgxMHwwfDR8MA==","isDateOfBirthApprox":false,"age":null,"dateOfBirth":"1974-01-01T00:00:00.00000Z","password":"QN2pH4t92mD_?u_@","country":"US","communicationThirdPartyOptIn":true,"communicationOptin":true,"preferredLanguage":"en"} I had to remove the email for testing purposes because freelancer project body requires emails removed I'm attempting to create a simple username check with basic POST requests, however I don't see anything in the cURL that's causing the results to be invalidated.