create user with admin privilages
dscl . -create /Users/abjorklund
dscl . -create /Users/abjorklund UserShell /bin/bash
dscl . -create /Users/abjorklund RealName "Andreas Bjorklund"
dscl . -create /Users/abjorklund UniqueID 1001
dscl . -create /Users/abjorklund PrimaryGroupID 1000
dscl . -create /Users/abjorklund NFSHomeDirectory /Users/abjorklund/
dscl . -passwd /Users/abjorklund password
dscl . -append /Groups/admin GroupMembership abjorklund
which version of macos are you running
sw_vers
ProductName: Mac OS X
ProductVersion: 10.13.5
BuildVersion: 17F66a