json error: expected value at line 1 column 1

[ag039st]

MAC os m3 ,

I used auth application-default login, and Im using the same json ,

but this is failling with json error: expected value at line 1 column 1
no clear of which expected value failed

let config = ClientConfig::default().with_auth().await;
match config {
Ok(con) => {
let client = Client::new(con);
info!("successfully connected ")
}
Err(error) => {
error!("something failed {}",error)
}
}

[jendakol]

This doesn't work for me either. I have vanilla JSON, downloaded from GCP, and configured the path with GOOGLE_APPLICATION_CREDENTIALS_JSON env. This error hit me in the face...

[jendakol]

Let me add that this works just fine:

    let credentials: CredentialsFile = serde_json::from_slice(&fs::read(std::env::var(
        "GOOGLE_APPLICATION_CREDENTIALS_JSON",
    )?)?)?;

    let config = ClientConfig::default()
        .with_credentials(credentials)
        .await?;

[jendakol]

Ehm, I am ashamed but my problem was that I used GOOGLE_APPLICATION_CREDENTIALS_JSON and put there path to the JSON file. Using GOOGLE_APPLICATION_CREDENTIALS works just fine.