why I am Not able to add "Shipping Rule" scope in custom api integartion

I am not able to use this epi endpoint

https://api.easyship.com/2023-01/shipping_rules

{
"error": {
"code": "forbidden",
"details": [
"Access to this resource requires scope(s) shipping_rule."
],
"message": "You do not have permission to access this resource. Please contact our support team or your account manager if you believe you should have access.",
"request_id": "afbf9eb37531f075083ca3e31b5c454b",
"type": "invalid_request_error"
}
}

Also there is no scope listed in the api integration scopes