Fix failures due to creating users during initial migrations
Fix failures due to creating users during initial migrations

appsembler/edx-platform,gymnasium/edx-platform,kmoocdev2/edx-platform,CredoReference/edx-platform,Edraak/edraak-platform,appsembler/edx-platform,appsembler/edx-platform,gymnasium/edx-platform,appsembler/edx-platform,Edraak/edraak-platform,Stanford-Online/edx-platform,CredoReference/edx-platform,CredoReference/edx-platform,gymnasium/edx-platform,Edraak/edraak-platform,gymnasium/edx-platform,Stanford-Online/edx-platform,Edraak/edraak-platform,kmoocdev2/edx-platform,kmoocdev2/edx-platform,Stanford-Online/edx-platform,CredoReference/edx-platform,kmoocdev2/edx-platform,kmoocdev2/edx-platform,Stanford-Online/edx-platform