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Firebase Authentication - Application and Data, Application Utilities, and User Management and Authentication
Active Directory - Are you an AD beginner? Read this article to understand the basics of Active Directory and get a clearer picture of it.
JSON Web Token - JSON Web Tokens are an open, industry standard RFC 7519 method for representing claims securely between two parties.
LDAP - LDAP is a very flexible standards-based method that can be used to store and query information about users, groups, devices and provide authentication and authorization services in a networked environment.