Fix credential_name

Change-Id: I7eeed36b2f4d4cc47e8b2de56abcecaee24706f3
Signed-off-by: David Garcia <david.garcia@canonical.com>
diff --git a/n2vc/n2vc_juju_conn.py b/n2vc/n2vc_juju_conn.py
index 0e10337..71ff06a 100644
--- a/n2vc/n2vc_juju_conn.py
+++ b/n2vc/n2vc_juju_conn.py
@@ -1348,7 +1348,7 @@
                         model_name=model_name,
                         config=config_dict,
                         cloud_name=self.cloud,
-                        credential_name="admin",
+                        credential_name=self.cloud,
                     )
                 self.log.info("New model created, name={}".format(model_name))
             else: