style: prefer stdlib idioms for errors and http methods

internal/deezer/session.go

@@ -31,7 +31,7 @@ func authenticate(ctx context.Context, arlCookie string) (*Session, error) {
 	}
 
 	url := "https://www.deezer.com/ajax/gw-light.php?method=deezer.getUserData&input=3&api_version=1.0&api_token="
-	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
 	if err != nil {
 		return nil, err
 	}