First, the steps here do not work: How do I add a user and allow them access to only one project?
The user still sees all projects.
This KB Article seems close: How to restrict project access to different isolated user groups
but there are Cogs everywhere so it's like playing Whack-a-Mole and never hitting the right one.
I'm asking for the simplest access scenario conceivable: one user <-> one project.
I have to ask for very precise steps for the current UI, JUN 2018. Every older article deadends around step 3. Updates get lost in a sea of crosstalk.
I'm quite flummoxed that this is so difficult. This is literally one dialog, one check box in other systems. Am I missing something embarrassingly obvious?