Hasura - allow only select access to root queries

example.sh

# SourceNameGoesHere = the name as it appears in Hasura dashboard
# See example: https://twitter.com/ChronSyn/status/1551035751512657921/photo/1

curl --location --request POST 'https://[your-hasura-address-dot-com]/v1/metadata' \
  --header 'x-hasura-admin-secret: <your hasura admin secret>' \
  --header 'X-Hasura-Role: admin' \
  --header 'Content-Type: application/json' \
  --data-raw '{
    "type" : "pg_create_select_permission",
    "args" : {
      "table" : {
          "name": "name_of_your_table",
          "schema": "schema_of_your_table"
      },
      "role" : "public",
      "source": "SourceNameGoesHere",
      "permission" : {
        "columns" : "*",
        "filter" : {},
        "query_root_fields": ["select"],
        "subscription_root_fields": []
      }
    }
  }