DOC-4376 Differentiate between locked out users & incorrect/expired passwords on the CM UI sign-in screen

Author: rrelledge

content/operate/rs/references/rest-api/objects/user.md

@@ -28,4 +28,4 @@ An API object that represents a Redis Enterprise user.
 | password_issue_date | string | The date in which the password was set (read-only) |
 | role | 'admin'<br />'cluster_member'<br />'cluster_viewer'<br />'db_member'<br /> **'db_viewer'** <br />'none' | User's [role]({{< relref "/operate/rs/references/rest-api/permissions#roles" >}}) |
 | role_uids | array of integers | UIDs of user's roles for role-based access control |
-| status | 'active'<br />'locked' | User sign-in status (read-only)<br />**active**: able to sign in<br />**locked**: unable to sign in |
+| status | 'active'<br />'locked'<br />'password_expired' | User sign-in status (read-only)<br />**active**: able to sign in<br />**locked**: unable to sign in<br />**password_expired**: unable to sign in because the password expired |

content/operate/rs/release-notes/rs-7-8-releases/rs-7-8-2-tba.md

@@ -75,6 +75,8 @@ This version offers:
 
         - [**High availability**]({{<relref "/operate/rs/databases/configure#high-availability">}}) and [**Durability**]({{<relref "/operate/rs/databases/configure#durability">}}) have separate sections.
 
+    - Improved error messages on the sign-in screen for locked out users versus incorrect or expired passwords.
+
 - A new **User Manager** role designed for user administration is available for [role-based access control]({{<relref "/operate/rs/security/access-control">}}).
 
     - This management role allows assigned users to create, edit, and delete users using the Cluster Manager UI and REST API.