request body logic with JSON raw data - php

Question

I am trying to send raw JSON data via Postman as required parameter.
My function works fine except that part. When I paste json data into postman it throws:
A non-empty request body is required.
I think there is a little modification needed but I can't find solution.
My code:
public function callApi(BaseRequest $request)
{
$token = $this->getTokenForRequest($request);
$method = $request->getMethod();
$client = new Client(['base_uri' => 'https://api-tst.testing.app/test/']);
$headers = [
'Authorization' => 'Bearer ' . $token,
'Ocp-Apim-Subscription-Key' => '1111112222',
'Content-Type' => 'application/json',
];
$request->getRequestParams();
$res = $client->request($method, $request->getUrl(), [
'headers' => $headers
]);
$res->getStatusCode();
$response = $res->getBody()->getContents();
return $response;
}
and form my BaseRequest:
public function getUrl()
{
return null;
}
public function getMethod()
{
return null;
}
/**
* #return array
*/
public function getRequestParams()
{
$data = [];
return $data;
}
And I am calling it in controller like:
public function testAll(Request $request)
{
$data = (string)$request->getContent();
$data = json_decode($data, true);
$response = $this->container->get('app')->myFunction($data);
dump($response);die;
}

Answer 1

Found it!
$res = $client->request($method, $request->getUrl(), [
'headers' => $headers,
'json' => $request->getRequestParams()
]);