We are trying to register our phone number by calling the {{Phone-Number-ID}}/register API but are getting the following response. We are taking the access token from the WhatsApp Manager > API Setup (the token that is already generated for the test number). Let us know if that's the correct access token if not then please help us in generating the correct one.

Registration API Request ​ curl --location 'https://graph.facebook.com/v20.0/{{phone-number-id}}/register' \ --header 'Content-Type: application/json' \ --header 'Authorization: ••••••' \ --data '{ "messaging_product": "whatsapp", "pin": "{{6-digit-pin}}" }' API Response { "error": { "message": "Unsupported post request. Object with ID '{phone-number-id}}' does not exist, cannot be loaded due to missing permissions, or does not support this operation. Please read the Graph API documentation at https://developers.facebook.com/docs/graph-api", "type": "GraphMethodException", "code": 100, "error_subcode": 33, "fbtrace_id": "ACipcrnboksxiiYMYnog5I9" } }