Read the Docs and search this forum for answers before posting questions… this has been answered many times.
You do not share the AUTH (that is for determining Hardware used in a project, not users), you share the project or the account.
Use the Share hardware Access for use only (no editing - but only one project can be shared at a time)
Or use the same account login for all cell phones, giving everyone the same simultaneous access to all projects.
Create a dedicated seperate account if you don’t want to use your development account.