I followed this basic tutorial, but I get:
Eroare:redirect_uri_mismatch The redirect URI in the request: urn:ietf:wg:oauth:2.0:oob did not match a register
The URI urn:ietf:wg:oauth:2.0:oob is a special URI used to identify out-of-browser applications, i.e. non-web applications (desktop, mobile, command line, etc.).
When you create the credentials in the APIs Console, make sure you select "Installed Application" as the application type and the redirect URI will automatically be set as urn:ietf:wg:oauth:2.0:oob and prevent the "redirect_uri_mismatch" when making a request.