curl --location --request GET 'https://analytics.googleapis.com/analytics/v3/metadata//columns'
{
"attributeNames": [
"string"
],
"etag": "string",
"items": [
{
"attributes": {
"property1": "string",
"property2": "string"
},
"id": "string",
"kind": "analytics#column"
}
],
"kind": "analytics#columns",
"totalResults": 0
}