Grant permissions to the specified hub site

• command: spo hubsite rights grant -i|--id <id> -p|--principals <principals> -r|--rights <rights>
• id: hub site ID
• principals: array of principals to whom the specified permissions should be granted
• rights: permissions that should be granted. Allowed values Join
• requires connection to the SharePoint tenant admin site

For more information see the Grant-SPOHubSiteRights cmdlet in the November release of the SPO PowerShell.