fix comments

Author: nineela

src/azure-cli/azure/cli/command_modules/appservice/_params.py

@@ -12,7 +12,7 @@
                                                 get_three_state_flag, get_enum_type, tags_type)
 from azure.cli.core.local_context import LocalContextAttribute, LocalContextAction
 from azure.cli.command_modules.appservice._appservice_utils import MSI_LOCAL_ID
-from azure.mgmt.web.models import DatabaseType, ConnectionStringType, BuiltInAuthenticationProvider, AzureStorageType
+from azure.mgmt.web.models import DatabaseType, ConnectionStringType, BuiltInAuthenticationProvider, AzureStorageType, AutoGeneratedDomainNameLabelScope
 
 from ._completers import get_hostname_completion_list
 from ._constants import (FUNCTIONS_VERSIONS, LOGICAPPS_NODE_RUNTIME_VERSIONS, WINDOWS_OS_NAME, LINUX_OS_NAME,
@@ -166,7 +166,7 @@ def load_arguments(self, _):
         c.argument('acr_identity', help='Accept system or user assigned identity which will be set for acr image pull. '
                                         'Use \'[system]\' to refer system assigned identity, or a resource id to refer user assigned identity.')
         c.argument('basic_auth', help='Enable or disable basic auth for both SCM and FTP Basic Auth Publishing Credentials. Defaults to Enabled if not specified. See https://aka.ms/app-service-basic-auth to learn more.', arg_type=get_enum_type(BASIC_AUTH_TYPES))
-        c.argument('auto_generated_domain_name_label_scope', options_list=['--domain-name-scope'], help="Specify the scope of uniqueness for the default hostname during resource creation.", choices=['TenantReuse', 'SubscriptionReuse', 'ResourceGroupReuse', 'NoReuse'])
+        c.argument('auto_generated_domain_name_label_scope', options_list=['--domain-name-scope'], help="Specify the scope of uniqueness for the default hostname during resource creation.", arg_type=get_enum_type(AutoGeneratedDomainNameLabelScope))
         c.ignore('language')
         c.ignore('using_webapp_up')