Fix create_user command

[thebeanogamer]

I'm not sure why we were setting nargs and const. Setting required seems much more sensible.
Resolves #260

[RACTFBot]

✔️ Auto-approved due to hotfix/ branch.

[codecov]

Codecov Report

Merging #263 (1f1190e) into master (8f3e616) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #263   +/-   ##
=======================================
  Coverage   96.65%   96.65%           
=======================================
  Files         108      108           
  Lines        5026     5026           
  Branches      267      267           
=======================================
  Hits         4858     4858           
  Misses        137      137           
  Partials       31       31           

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[jchristgit]

I thought these were optional?

    if not options["password"]:
        options["password"] = Member.objects.make_random_password(length=14)
    if not options["email"]:
        options["email"] = options["username"] + "@bot.ractf"

[thebeanogamer]

@jchristgit You are, as always, correct

[jchristgit]

Thanks!