ceph: handles an user creation error if the store is missing

Currently if object store is missing user creation fails without throwing
any error. Here the access and secret key values will be checked post the
creation command

Signed-off-by: Jiffin Tony Thottan <thottanjiffin@gmail.com>

pkg/operator/ceph/object/user.go

@@ -81,6 +81,8 @@ func decodeUser(data string) (*ObjectUser, int, error) {
 	if len(user.Keys) > 0 {
 		rookUser.AccessKey = &user.Keys[0].AccessKey
 		rookUser.SecretKey = &user.Keys[0].SecretKey
+	} else {
+		return nil, RGWErrorBadData, errors.New("AccessKey and SecretKey are missing")
 	}
 
 	return &rookUser, RGWErrorNone, nil