userman wait events: apply namespace (location)
backend.Connection: txt && json requests

App.backend.req('/ns/action', 'online')
App.backend.req('/ns/action', { status: "online" })
rename `req.body.plain_text` to 'req.txt'

thus there counterparts finally:
                       - UI -                        | = backend =
App.backend.req('/ns/action', 'online')              | req.txt = 'online'
App.backend.req('/ns/action', { status: "online" })  | req.json = { status: "online" }
um.mwBasicAuthorization: protect namespace from unauthorized requests