Post data to Djnago rest API via emberJS in desired format

I have EmberJS using Django REST API, I have few checkboxes which I am using to filter the data based on selection of checkbox.

<label>Certificate</label>
<div>
    <div>
        <div class="form-group-checkbox">
            
            <label for="certificate_A">A</label>
        </div>
        <div class="form-group-checkbox">
            
            <label for="certificate_B">B</label>
        </div>
        <div class="form-group-checkbox">
            
            <label for="certificate_C">C</label>
        </div>                
    </div>
</div>

Currently I am getting below in querystring while calling the API:

.../Search?certificate_A=true&certificate_B=true

But the API needs string array for this parameter and it expects the parameter as mentioned below:

../Search?certification=certificate_A&certification=certificate_B

How can I modify the emberJS code to generate the API request in above shown format?