querying `launches` returns errors on "final" repo.

It seems the tutorial is out of date, as even the final returns errors, so I know it isn't with my implementation after going through the tutorial.

The playground returns the following after running the `GetLaunches` query from the tutorial:

```
{
"error": {
"errors": [
{
"message": "Cannot query field \"id\" on type \"LaunchConnection\".",
"locations": [
{
"line": 3,
"column": 5
}
],
"extensions": {
"code": "GRAPHQL_VALIDATION_FAILED",
"exception": {
"stacktrace": [
"GraphQLError: Cannot query field \"id\" on type \"LaunchConnection\".",
" at Object.Field (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/validation/rules/FieldsOnCorrectType.js:64:31)",
" at Object.enter (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/language/visitor.js:333:29)",
" at Object.enter (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/language/visitor.js:384:25)",
" at visit (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/language/visitor.js:251:26)",
" at Object.validate (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/validation/validate.js:63:22)",
" at validate (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/apollo-server-core/dist/requestPipeline.js:172:32)",
" at Object. (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/apollo-server-core/dist/requestPipeline.js:113:38)",
" at Generator.next ()",
" at fulfilled (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/apollo-server-core/dist/requestPipeline.js:4:58)",
" at process._tickCallback (internal/process/next_tick.js:68:7)"
]
}
}
},
{
"message": "Cannot query field \"mission\" on type \"LaunchConnection\".",
"locations": [
{
"line": 4,
"column": 5
}
],
"extensions": {
"code": "GRAPHQL_VALIDATION_FAILED",
"exception": {
"stacktrace": [
"GraphQLError: Cannot query field \"mission\" on type \"LaunchConnection\".",
" at Object.Field (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/validation/rules/FieldsOnCorrectType.js:64:31)",
" at Object.enter (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/language/visitor.js:333:29)",
" at Object.enter (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/language/visitor.js:384:25)",
" at visit (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/language/visitor.js:251:26)",
" at Object.validate (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/graphql/validation/validate.js:63:22)",
" at validate (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/apollo-server-core/dist/requestPipeline.js:172:32)",
" at Object. (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/apollo-server-core/dist/requestPipeline.js:113:38)",
" at Generator.next ()",
" at fulfilled (/home/petty/Github/apollo-graphql/fullstack-tutorial/final/server/node_modules/apollo-server-core/dist/requestPipeline.js:4:58)",
" at process._tickCallback (internal/process/next_tick.js:68:7)"
]
}
}
}
]
}
}
```

Commencez dans l’implémentation du tutoriel de final/server et inspectez le schéma utilisé par la requête GetLaunches dans le playground. Comparez les champs demandés par la requête avec le type LaunchConnection et le texte du tutoriel. La tâche est terminée lorsque la requête documentée correspond au schéma final et s’exécute sans erreurs de validation GraphQL.

Rédigé par le modèle d'indexation à partir du texte de l'issue.