Update rbac-guide.md

Author: naveedkharadi

articles/key-vault/general/rbac-guide.md

@@ -22,7 +22,7 @@ Azure role-based access control (Azure RBAC) is an authorization system built on
 
 Azure RBAC allows users to manage Key, Secrets, and Certificates permissions. It provides one place to manage all permissions across all key vaults.
 
-The Azure RBAC model allows uses to set permissions on different scope levels: management group, subscription, resource group, or individual resources.  Azure RBAC for key vault also allows users to have separate permissions on individual keys, secrets, and certificates
+The Azure RBAC model allows users to set permissions on different scope levels: management group, subscription, resource group, or individual resources.  Azure RBAC for key vault also allows users to have separate permissions on individual keys, secrets, and certificates
 
 For more information, see [Azure role-based access control (Azure RBAC)](../../role-based-access-control/overview.md).