Create MspAccountManager with a cleanup() method to cleanup obsolete MSP link when the cleanupauthentic command is run (refs #5573)

models.py

@@ -5,12 +5,29 @@ import urlparse
 
 from requests_oauthlib import OAuth2Session
 
-from django.db import models
+from django.db import models, transaction
+from django.db.models.query import Q
 from django.contrib.auth import get_user_model
 from django.utils.translation import ugettext_lazy as _
 
 from . import app_settings
 
+class MspAccountManager(models.Manager):
+    def cleanup(self):
+        logger = logging.getLogger(__name__)
+
+        for msp_account in self.filter(Q(user__isnull=True)
+                |Q(user__deleteduser__isnull=False)):
+                try:
+                    with transaction.commit_on_success():
+                        if msp_account.refresh_token():
+                            if msp_account.token:
+                                self.api_call('app/rest/agc', method='delete')
+                            msp_account.delete()
+                except:
+                    logger.exception('unable to delete msp account %s', msp_account)
+
+
 class MspAccount(models.Model):
     user = models.OneToOneField(get_user_model(),
             verbose_name=_('user'),
@@ -20,6 +37,8 @@ class MspAccount(models.Model):
     agc = models.CharField(max_length=64, verbose_name=_('access grant code'))
     token = models.TextField(verbose_name=_('access token'))
 
+    objects = MspAccountManager()
+
     def api_call(self, api_path, method='get', **kwargs):
         url = urlparse.urljoin(app_settings.api_url, api_path)
         session = OAuth2Session(app_settings.client_id,