My HPC account just has been created but I cannot login or Slurm rejects my jobs
Home directories and entries to the Slurm data base are only done once per day (in the late morning). Thus, be patent and wait for the next day at 10 o’clock if your HPC account has just been (re)created.
As with SSH key updates (and password updates for legacy accounts), the processes run on different servers at different times. Thus, before the next day, some of your directories or services may have already been created while others aren’t.