3x Magento Master
Magento comes with a new design pattern called the service contracts.
A service contract is a set of PHP interfaces used in a module. You can check an interface in any module API folder. Service contracts include service and data interfaces, which hide business logic details.
In Magento 2 You can add extension attributes for Order by creating an extension_attributes.xml file.
Extension attributes are the persistent Attribute so you can’t find extension_attributes values in a database.
If you want to create a new admin user via CLI, You can create a new admin user through CLI by typing the below command.
The admin:user:create command is used to create a new admin user via the command line interface.
This post will help when you are facing login with the admin panel and want to create a new user for admin.
In Magento 2, You can add a new custom tab on the Customer Edit page.
If you want to add a new tab in the Customer edit section for your custom requirement, You can add easily a customer tab in the Customer edit section.
You need to create a simple module to add an extra tab in the customer edit section.
Refer to the code snippet for adding an extra tab,
I have taken Rbj as Packagename and CustomerTab as modulename for simplicity.