How to set a default value in graphql?

@lindsey.homenick 

In GraphQL, you can set a default value for a field by using the defaultValue option in the schema definition. This option allows you to specify a default value that will be used if the field is not provided in the query.

Here's an example of how to set a default value in a GraphQL schema:

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type Query {
  greeting(name: String = "World"): String
}

In this example, the greeting field has a default value of "World" for the name parameter. If the name parameter is not provided in the query, the default value of "World" will be used.

You can also set a default value for non-null fields by using a combination of the defaultValue and ! syntax. For example:

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type Query {
  greeting(name: String! = "World"): String
}

In this example, the name parameter is marked as non-null using the ! syntax, but it also has a default value of "World". This means that the field must be provided in the query, but if it is not provided, the default value of "World" will be used.