Example query returns an error in GraphiQL

[willowell]

Hello!

I just cloned the repository, but the example query in the README is returning an error in GraphiQL.

To build the server, I:

1. cloned the repository,
2. ran stack build inside the repository,
3. ran npm install inside the repository,
4. and finally ran npm start.

The query in question is:

query GetDeity {
  deity(name: "Morpheus") {
    name
    power
  }
}

which returns

{
  "errors": [
    {
      "message": "Failure on Resolving Field \"deity\": DB Error: could not find entry for ID \"Morpheus\"",
      "locations": [
        {
          "line": 2,
          "column": 27
        }
      ]
    }
  ]
}

The other endpoint is fine, that is:

query GetDeity {
  deities {
    name
    power
  }
}

returns

{
  "data": {
    "deities": [
      {
        "name": "Morpheus",
        "power": "Shape shifting"
      },
      {
        "name": "Poseidon",
        "power": "Storm"
      },
      {
        "name": "Zeus",
        "power": "thunder"
      }
    ]
  }
}

Any idea what's going on here? Did I miss something setting up the server? If there's any info I can give that may help, just let me know!