changeScope method
Implementation
Future<bool> changeScope(String scope) async {
this.scope = scope;
if(gsi != null && !gsi!.scopes.contains(scope)){
if((await gsi!.requestScopes([scope]))) return false;
}
wd = this.scope == DriveApi.driveAppdataScope ? "appDataFolder" : "root";
return true;
}