查询中的where应为对象。您没有正确编写where子句
您要查询“popular_streamers . so you are visiting the database to get some data based on a condition and you specify this condition with where”。

query MyQuery($where: popular_streamers_bool_exp!) {
    // specificProperty one of the columns in the table where you want to write condition
    // get me all popular_streamers where specificProperty is equal to variable $where
    popular_streamers(where: {specificProperty:{_eq:$where}) {
        first_name
        last_name
    }
}