[Doc] Create technical documentation of be able to manage optional verification steps that End User can set up as an additional verifier of one verification step to sign into the portal as an Instance Administrator

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 7.3.X, Master
• Component/s: Application Security > Multi-Factor Authentication
• Labels:
  • Old_Documentation_Ticket
• Sprint: Iteration 34, Iteration 35, Iteration 36, Iteration 37, Iteration 38, Iteration 39, Iteration 40

Background
Why does this feature exist? Who needed it? What problem does it solve? How can it be used by the user or developer? How does it make life easier?
 
Features
What does this feature do? For example, does it let you add/change/delete anything? How else does it operate on data? Can a developer modify or customize any of these features? Why would anybody want to use or develop on this?
 
Steps
List the steps a developer needs to take to implement this feature, or a user needs to perform in order to use this feature.
 
Code
Provide example code illustrating an example of this feature. Explain what the code does and how it works.

Key related classes/methods and modules, configuration interfaces; any specific implementation details that helps understanding how it works, provides hints for debugging and fixing.
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Please, see: LPS-114241 and LPS-114242