curl --location --request GET 'https://gmail.googleapis.com//gmail/v1/users//settings/vacation'
{
"enableAutoReply": true,
"endTime": "string",
"responseBodyHtml": "string",
"responseBodyPlainText": "string",
"responseSubject": "string",
"restrictToContacts": true,
"restrictToDomain": true,
"startTime": "string"
}