The appliance key that you produced during the application registration portal on your application. Really don't use the applying solution in a local app or single site application since a client_secret can't be reliably stored on units or web pages. It can be expected for Internet apps and Internet APIs, https://beau6jwi8.suomiblog.com/the-single-best-strategy-to-use-for-tentenbet-registration-code-47763608