Resolve "Refactor how PNDs are implemented in the code"

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

Closes #243

controller/northbound/server/auth.go

@@ -154,6 +154,7 @@ func (s AuthServer) handleLogout(ctx context.Context, userName string) error {
 			Password: storedUser.GetPassword(),
 			Token:    " ",
 			Salt:     storedUser.GetSalt(),
+			Metadata: storedUser.GetMetadata(),
 		})
 
 		if err != nil {