Apex to MondayAPI

MondayApi.cls

public class MondayApi {
    
    @SuppressWarnings('PMD.ApexSuggestUsingNamedCred')
    public static Map<String, Object> execute(String query) {
        HttpRequest request = new HttpRequest();
        request.setEndpoint('callout:MondayApi');
        request.setMethod('POST');
        request.setBody(JSON.serialize(new Map<String, Object>{
            'query' => query
        }));
        request.setHeader('Content-Type', 'application/json');
        request.setHeader('Authorization', '{!$Credential.Password}');

        HttpResponse response = new Http().send(request);
        Map<String, Object> responseBodyAsMap = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());

        return responseBodyAsMap;
    }
}

sample.cls

String escapedPayload = JSON.serialize(new Map<String, Object>{
    'numbers' => '0',
    'link' => new Map<String, Object>{
        'text' => 'Google',
        'url' => 'https://google.com'
    },
    'email' => new Map<String, Object>{
        'email' => 'ronaldo@sample.com',
        'text' => 'Ronaldo'
    },
    'checkbox' => new Map<String, Object>{
        'checked' => 'true'
    },
    'date3' => new Map<String, Object>{
        'date' => '2023-10-13'
    },
    'people7' => new Map<String, Object>{
        'personsAndTeams' => new List<Object>{
            new Map<String, Object>{
                'id' => '42466775',
                'kind' => 'person'
            }
        }
    }
});

MondayApi.execute(
    'mutation {' +
        'create_item (board_id: 4442867299, group_id: "other", item_name: "new item", column_values: "' + escapedPayload.escapeJava() + '") {' +
        '    id' +
        '}' +
    '}'
);