How to download data into JSON file from URL in nestjs?

I am trying to download data into JSON file from URL in nestjs but I cannot figure out how to do it.

Below is my controller function with reference to this answer.

export class DataController {
constructor(private readonly httpService: HttpService) { }

@Get()
async download(@Res() res) {
    const writer = createWriteStream('user.json');

    const response = await this.httpService.axiosRef({
        url: 'https://api.github.com/users/prasadg',
        method: 'GET',
        responseType: 'stream',
        headers: {
            'Content-Type': 'application/json',
        }
    });

    response.data.pipe(writer); <--- Error here:  Property 'pipe' does not exist on type 'unknown'.

    return new Promise((resolve, reject) => {
        writer.on('finish', resolve);
        writer.on('error', reject);
    });
}

As I mentioned above it is showing error

error TS2339: Property 'pipe' does not exist on type 'unknown'

Expected result : I want to write json data into file (user.json) in my folder on server.

How do I solve this problem?

This is just a types mistake, make sure the axios is in your project by this command:

npm i axios 

Then just declare the type in your response variable

@Get()
    async download() {
        const writer = createWriteStream('user.json');
        // response variable has to be typed with AxiosResponse<T> 
        const response: AxiosResponse<any> = await this.httpService.axiosRef({
            url: 'https://api.github.com/users/prasadg',
            method: 'GET',
            responseType: 'stream',
        });

        response.data.pipe(writer);

        return new Promise((resolve, reject) => {
            writer.on('finish', resolve);
            writer.on('error', reject);
        });
    }