creating-sample-user.md documentation fix

[maymcggithub]

What should be cleaned up or changed?

The clarity of instructions in creating-sample-user.md is not particularly clear, and could have improved documentation readability. Particularly notable in "Getting a long-lived Bearer Token for ServiceAccount"

Why is this needed?

This is necessary to make sure that the documentation is clear and able to support users without discrepancy in wording.