Google Drive API message “Daily Limit for Unauthenticated Use Exceeded.” while viewing files from Salesforce

Question

I created a service account, got json configuration file and I request an access token using it. The response is ok, I receive token. When I upload file using it everything is o

Answer 1

I found out what was the problem. I was sending access token in the url address instead of in the header. Eventually I did it like this:

public List getFilesList() {
 Http http = new Http();
 HttpRequest req = new HttpRequest();
 req.setMethod('GET');
 req.setEndpoint('https://www.googleapis.com/drive/v2/files);
 req.setHeader('Authorization', 'Bearer '+accessToken);
 HttpResponse resp = http.send(req);
 return null;
}