Can you please someone help me to automate multiuser use case is in protractor.?

How to automate multiuser use case is in protractor. Can you please someone help?

use case User A login Updating the field amount on page1 Same time User B also updating the field amount on Page 1. both have seen both are working on the same field.

e.g. You consider shared excel examples.

Note: I am new in protractor