How to upload a File?

[RicardoRien]

I'm using NestJS con GraphQL, trying to upload a couple of .xlsx but Any of the routes I gave works. What I'm doing wrong?

The resolver looks like this:

  @Mutation(() => SuccessReponse)
  @UseInterceptors(FilesInterceptor('files'))
  createMultipleUsersWithXlsx(@Args('files', { 
    type: () => [GraphQLUpload] 
  }) files: Express.Multer.File[]) {
    return this.usersService.createMultipleUsersWithXlsx(files);
  }