olemus
ühene identifikaator juurdepääsu taotleva rakenduse autentimiseks, parooli analoog
= unique identifier of an application requesting access to a service

ülevaateid
https://www.wavemaker.com/learn/app-development/app-security/token-based-authentication/
https://scotch.io/tutorials/the-ins-and-outs-of-token-based-authentication