diff --git a/src/config.yaml b/src/config.yaml
index 8ae0d22..e2f0001 100644
--- a/src/config.yaml
+++ b/src/config.yaml
@@ -30,6 +30,10 @@ options:
     description: |
       A comma-separated list of nagios servicegroups. If left empty, the
       nagios_context will be used as the servicegroup.
+  service-user:
+    default: manila
+    type: string
+    description: Username used for keystone's service credential.
   rabbit-user:
     default: manila
     type: string
diff --git a/src/reactive/manila_ganesha.py b/src/reactive/manila_ganesha.py
index 2020ab7..b022aa2 100644
--- a/src/reactive/manila_ganesha.py
+++ b/src/reactive/manila_ganesha.py
@@ -7,7 +7,10 @@ import charms_openstack.charm as charm
 import charms.reactive.relations as relations
 
 import charmhelpers.core as ch_core
-from charmhelpers.core.hookenv import log
+from charmhelpers.core.hookenv import (
+    log,
+    config,
+)
 
 charms_openstack.bus.discover()
 
@@ -41,12 +44,18 @@ def setup_manila():
     }
 
 
+@reactive.when('config.changed.service-user')
+@reactive.when('identity-service.connected')
+def update_ident_username(keystone):
+    """Updates the user to the Identity Service"""
+    configure_ident_username(keystone)
+
+
 @reactive.when_not('identity-service.available')
 @reactive.when('identity-service.connected')
 def configure_ident_username(keystone):
-    """Requests a user to the Identity Service
-    """
-    username = 'manila'
+    """Requests a user to the Identity Service"""
+    username = config().get('service-user')
     keystone.request_credentials(username)
 
 
diff --git a/unit_tests/test_manila_ganesha_handlers.py b/unit_tests/test_manila_ganesha_handlers.py
index a3d8aaf..72bc6e3 100644
--- a/unit_tests/test_manila_ganesha_handlers.py
+++ b/unit_tests/test_manila_ganesha_handlers.py
@@ -50,6 +50,8 @@ class TestRegisteredHooks(test_utils.TestRegisteredHooks):
                                               'ganesha-pool-configured',),
                 'disable_services': ('cluster.connected',),
                 'configure_nrpe': ('nrpe-external-master.available',),
+                'update_ident_username': ('config.changed.service-user',
+                                          'identity-service.connected',),
             },
             'when_not': {
                 'ceph_connected': ('ganesha-pool-configured',),