I'm using RESTDataSource from apollo-datasource-rest library to query data from the opensearch index but running into http request errors.

After extending RESTDataSource class, I have a following method which I want to call to return data from index my_index where name field is exactly equal to the name parameter

async getDataByName(name) {
 const responseData = await this.get(`_search?index=my_index', {
  query: {
    match_phrase: {
     name: name
    }
   }
 })
}

I am getting invalid request error (request [/_search] contains unrecognized parameter: [query]) but same query works in postman. What i am doing wrong?

Tried following this docs but not very helpful - https://www.apollographql.com/docs/apollo-server/data/data-sources/#http-methods