diff --git a/idhub/management/commands/open_service.py b/idhub/management/commands/open_service.py
index 1cc04d6..dd15c5c 100644
--- a/idhub/management/commands/open_service.py
+++ b/idhub/management/commands/open_service.py
@@ -1,7 +1,15 @@
+import logging
+
+from nacl.exceptions import CryptoError
 from django.core.management.base import BaseCommand
 from django.core.management import call_command
 from django.core.cache import cache
 
+from idhub.models import DID
+
+
+logger = logging.getLogger(__name__)
+
 
 class Command(BaseCommand):
     help = "Command for open de service"
@@ -10,6 +18,23 @@ class Command(BaseCommand):
         parser.add_argument('key', nargs='?', default='', type=str, help='key')
 
     def handle(self, *args, **kwargs):
-        PASSWORD = kwargs["key"]
-        cache.set("KEY_DIDS", PASSWORD, None)
+        self._key = kwargs["key"]
+        cache.set("KEY_DIDS", self._key, None)
+
+        if not DID.objects.exists():
+            cache.set("KEY_DIDS", self._key, None)
+            call_command('runserver')
+            return
+
+        did = DID.objects.first()
+        cache.set("KEY_DIDS", self._key, None)
+        try:
+            did.get_key_material()
+        except CryptoError:
+            cache.set("KEY_DIDS", None)
+            txt = "Key no valid!"
+            logger.error(txt)
+            return
+
+        cache.set("KEY_DIDS", self._key, None)
         call_command('runserver')