looking for help setting up simple first time Postman query

[virtualbis]

Hi all, I'm trying to test a simple query in postman but keep getting errors.
It is saying "code": "invalid-headers" },
"message": "Missing Authorization header in JWT authentication mode"
My post url is
https://My.hasura.app/v1/graphql?X-Hasura-Admin-Secret=MySecret&

Under headers I have: key: content-type, value: application/json

My query directly copied from the console is

query MyQuery {
  t_user(where: {id: {_eq: "2"}}) {
    id
    name
  }
}

[virtualbis]

I found this that works with help but how do you convert from this:
query MyQuery { t_user(where: {id: {_eq: "2"}}) { name id } }
To this?
{"query":"query MyQuery {\n  t_user(where: {id: {_eq: \"2\"}}) {\n    name\n    id\n  }\n}\n","variables":null,"operationName":"MyQuery"}

[virtualbis]

Found it. If using Postman Post Graphql, just click on the "code" link and select the format needed. HTTP in my case and voila. Hope this helps someone