1 . approch one : client doesnt have facebook meta or dont want to share an app with us or sign up. what the best way to onborad him ? i can onborad him with a number but my name will be seein on the display number. the flow is i open an app, open whatsup account, do all the settings and verify everything, fix the display name and then i need permanent access token, if i have few apps and few clients and few whatsup account i use the same permanent access token ? i tried to make a new system user but it also says i can have one. ? what the best method here?

2, second approch : client got a facbook meta account and everything. i tell him to make an app and do whatsup account and then on parther solutions share the app with me so i would be able to edit everything on whatsup and get if verify ? and thats it ?