Add api token field to UserAdmin (#241)

shynet/core/admin.py

@@ -1,8 +1,15 @@
 from django.contrib import admin
-from django.contrib.auth.admin import UserAdmin
+from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
 
 from .models import Service, User
 
+
+class UserAdmin(BaseUserAdmin):
+    fieldsets = BaseUserAdmin.fieldsets + (
+        ("Extra fields", {"fields": ("api_token",)}),
+    )
+
+
 admin.site.register(User, UserAdmin)