I'm using the Developers API reference tool to try out the SMS API for a sandbox and I'm getting the error below. Please advise.
curl --request POST --url 'https://platform.devtest.ringcentral.com/restapi/v1.0/account/~/extension/~/sms' --header 'accept: application/json' --header 'authorization: Bearer U0pDMTJQMDFQQVMwMHxBQUE4WGxONFJtR2lPSzdKanducHFqcEt0ZklJRTJJOFdoeUZEU3ZSUUI3a3RmYi1CSlFLXzNJR0t2ckNoM2pqcTBFV2J6RFB3dlhDb0x6bmQtdk5yTEJlQzFDQTRCaUM3dGd0dGpDdW5pUkZXbTBJOG96NXpLRWpibll1Nzh3QXJsZ0FRMk45WnYxSlZXZmxTYmFCZzVQalNjdGlVazBfTWhBcUN3WEZWTnVteFQzTS1md1ZzVGxFVzNfYkNfa21WNG0yYkFNc2otY3xzWnVqc1F8RlVjLU1XUWpISHk0S3lTeWptWWhnQXxBUXxBQXxBQUFBQUFzemRHbw' --header 'content-type: application/json' --data '{"from":{"phoneNumber":"+16502344837"},"text":"TEST","to":[{"phoneNumber":"##########"}]}'
403 Forbidden
{
"errorCode": "FeatureNotAvailable"
"message": "The requested feature is not available"
"errors": [
0: {
"errorCode": "MSG-242"
"message": "The requested feature is not available"
}
]
}