chore(user): set AnonymousUser username

Author: lijianguo

rootfs/api/models/base.py

@@ -10,7 +10,7 @@
 from api.utils import dict_merge
 
 
-def get_anonymous_user_instance(user): return user(id=-1)
+def get_anonymous_user_instance(user): return user(id=-1, username=settings.ANONYMOUS_USER_NAME)
 
 
 class AuditedModel(models.Model):

rootfs/api/settings/production.py

@@ -121,7 +121,7 @@
     "guardian.backends.ObjectPermissionBackend",
 )
 GUARDIAN_GET_INIT_ANONYMOUS_USER = 'api.models.base.get_anonymous_user_instance'
-
+ANONYMOUS_USER_NAME = os.environ.get('ANONYMOUS_USER_NAME', 'AnonymousUser')
 ANONYMOUS_USER_ID = -1
 LOGIN_URL = '/v2/auth/login/'
 LOGIN_REDIRECT_URL = '/'