When there is a syntax error using GraphQL, Xray returns an error 400 with no details

When there is a syntax error using GraphQL, Xray returns an error 400 with no details.

Sometimes that can not be enough. For instance, when using the C# library GraphQL.client, it sees the 400 status and throws this error:

GraphQL.Client.Http.GraphQLHttpRequestException : The HTTP request failed with status code BadRequest

We need to analyze if this can be improved.