Adds command to get admin code

bookwyrm/management/commands/admin_code.py

@@ -0,0 +1,18 @@
+""" Get your admin code to allow install """
+from django.core.management.base import BaseCommand
+
+from bookwyrm import models
+
+def get_admin_code():
+    """get that code"""
+    return models.SiteSettings.objects.get().admin_code
+
+class Command(BaseCommand):
+    """command-line options"""
+
+    help = "Gets admin code for configuring BookWyrm"
+
+    # pylint: disable=unused-argument
+    def handle(self, *args, **options):
+        """execute init"""
+        self.stdout.write(get_admin_code())

bookwyrm/management/commands/generate_preview_images.py

@@ -10,7 +10,9 @@ class Command(BaseCommand):
 
     help = "Generate preview images"
 
+    # pylint: disable=no-self-use
     def add_arguments(self, parser):
+        """options for how the command is run"""
         parser.add_argument(
             "--all",
             "-a",
@@ -38,6 +40,7 @@ class Command(BaseCommand):
         preview_images.generate_site_preview_image_task.delay()
         self.stdout.write(" OK 🖼")
 
+        # pylint: disable=consider-using-f-string
         if options["all"]:
             # Users
             users = models.User.objects.filter(