curl --location --request GET '/api/v1/accounts//custom_attribute_definitions/'
{
"id": 0,
"attribute_display_name": "string",
"attribute_display_type": "string",
"attribute_description": "string",
"attribute_key": "string",
"attribute_values": "string",
"default_value": "string",
"attribute_model": "string",
"account_id": 0
}