Prisma

<@U3D8LQ8HK> The last line of that chapter, literally is:

“That’s it! You can now restart the server and send the vote mutation in your app Playground.”

Am I supposed to know how format this mutation at this point?

Ah! So, you’re talking about the `Applying authentication` chapter :slightly_smiling_face:

&gt; Am I supposed to know how format this mutation at this point?

At this point, you’re correct that the tutorial implicitly assumes that you know how to write a `vote` mutation! However (and thanks so much for pointing that out), there should definitely be an example for it as this is a step-by-step tutorial that shouldn’t the reader confused!

In general, you can deduct what a mutation looks like from the corresponding field in the GraphQL schema. Here’s an example for the `vote` mutation:

```
mutation {
  vote(linkId: "__SOME_LINK_ID__") {
    id
  }
}
```

This is what the field in the schema looked like:

```
type Mutation {
  vote(linkId: ID!): Vote
}
```

`vote` is the _root field_ to be used in the mutation and it takes one argument which is the `linkId` of the `Link` you want to submit a vote for :slightly_smiling_face:

if you want to get a deeper understanding of that part, I recommend checking out this article: <https://blog.graph.cool/graphql-server-basics-the-schema-ac5e2950214e>

<@U3D8LQ8HK> Thanks for the explanation, example code and reference article. very helpful, I will definitely check them out. :grimacing: