how to send a request to speech-to-text v2 with node js

[piratebay]

I am trying to send a post-request to the stt v2 rest API with node js but I keep on getting Error: HTTP error! status: 404 I am using one of the service endpoints provided on the stt rest documentation. What am I doing wrong? 

const fs = require('fs');

const fetch = require('node-fetch');

const apiKey = 'my_api_key';
const projectId = 'my_project_idr';
const location = 'us-central1';
const model = 'chirp';

const audioFilePath = 'audios/my_audio.mp3';
const audioContent = fs.readFileSync(audioFilePath).toString('base64');

const requestBody = {
    config: {
        language_codes: ["en-US"],
        model: "chirp",
        features: {
            "enableWordTimeOffsets": true,
            "enableWordConfidence": true
        },
    },
    content: audioContent
};

const requestOptions = {
    method: 'POST',
    headers: {
        'Content-Type': 'application/json',
        Authorization: `Bearer ${apiKey}`,
    },
    body: JSON.stringify(requestBody),
};

fetch(`https://us-central1-speech.googleapis.com/v2/recognizer=projects/${projectId}/locations/${location}/recognizers/_`, requestOptions)
    .then(response => {
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        return response.json();
    })
    .then(data => {
        console.log(data);
    })
    .catch(error => {
        console.error('Error:', error.message);
    });