Assign users to group: Missing visual label for the form fields

Issue Summary

Visual label is missing for "Add users" input field present in the main content area.

Steps to Reproduce

1. Open the "Assign users to group" page.
2. Navigate onto the mentioned instance.
3. Observe that no visual label is provided for the input field.

Screenshot

Actual Results

The visual label is not provided for "Add users" input field.
As a result, cognitive users will find it difficult to understand the purpose of the input field after typing the text in the input field and low-vision users will also find it difficult, as the placeholder text fails the minimum color contrast ratio i.e., 4.5:1. 

Expected Results

The visual label should be provided, as well as it should be implicitly/explicitly associated with the input field. 

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available.

Environment

MacBook Pro (16-inch, 2021)
macOs Sonoma 14.0
Chrome - Version 118.0.5993.70 (Official Build) (arm64)
Firefox- Version 92.0 (64-bit) 
Safari- Version 17.0 (19616.1.27.211.1)
JAWS- Version 2023 
NVDA- Version 2021.2 
Voiceover - Version Latest