Guzzle client in Laravel: InvalidArgumentException: "No method is configured to handle the form_params config key"

Question

I am trying to use Guzzle client to post requests to an API, and I am getting an error message saying,

InvalidArgumentException: "No method is configured to handle the form_params config key"

This is what I have tried:

$response = $this->guzzle->post("https://example.com",[
                'form_params'=> [
                    'client_id'=>$this->client_id,
                    'authorization_code'=>$this->authorization_code,
                    'decoder_query'=> $this->requestQuery
                  ],
            ]
        );

$this->requestQuery is a JSON request.

Answer 1

$response = $this->guzzle->post("https://example.com", [
    'body' => [
        'client_id'         => $this->client_id,
        'authorization_code'=> $this->authorization_code,
        'decoder_query'     => json_encode($this->requestQuery),
    ]
]);

with this syntax I am getting it woking..