Gist displaying GraphQL, JSON, and Rust code snippets for help question.

error_response.json

{  
    "errors":[  
        {  
            "message":"Variable \"$input\" expected value of type \"Owner\" which cannot be used as an input type.",
            "locations":[  
                {  
                    "line":1,
                    "column":19
                }
            ]
        }
    ]
}

json_graphql.rs

let input = Owner::new(
    "John".to_string(),
    "Doe".to_string(),
    Some("Strange".to_string()),
    Gender::Male,
    vec!["+14687210744573"],
    vec!["example@gmail.com"]
).unwrap();
let query =
r#"mutation AddOwner($input: Owner) {
    addOwner(input: $input) {
        id
    }
}"#;
let value = json!({
    "query": query,
    "variables": {
        "input": input
    } 
});

mutation_query.json

{  
    "query":"mutation AddOwner($input: Owner) {\n        addOwner(input: $input) {\n            id\n        }\n    }",
    "variables":{  
        "input":{  
            "_id":{  
                "$oid":"5d53488f005b23ea00c14f59"
            },
            "first_name":"John",
            "surname":"Doe",
            "other_names":"Strange",
            "gender":"Male",
            "contact_numbers":[ 
                "+14687210744573"
            ],
            "email_addresses":[  
                "example@gmail.com"
            ]
        }
    }
}

schema.graphql

enum Gender {
    Male
    Female
}
 
type Owner {
    id: ObjectId!
    firstName: String!
    surname: String!
    otherNames: String
    gender: Gender!
    contactNumbers: [String]!
    emailAddresses: [String]!
}