janssen-1.0.0-beta.15

instructions for duo 2 step authn (#2191)

* docs: add first draft

* docs: add duo creds details

* docs: remove side notes

* docs: add instructions for plugin

* add steps for updating attributes

* docs: move content to the correct location

* docs: change prereqs

* docs: proofreading

* docs: proofread

* docs: diagram for Duo integration

* docs: run spell check

* docs: add step to set default acr

* docs: add description for final user experience

* docs: middle align image

* docs: comment the link to additional properties

* docs: restore backup.md file