OpenID

IdentityServer4, ASP.NET Core API and a client with username/password

This is an end-to-end guide on how to quickly setup IdentityServer4, use it in your ASP.NET Core API for authentication, and finally login to your API from a client by asking a user for her/his username and password. It is divided in three parts that describe respectively the configuration of each one of the following three systems:

  • IdentityServer4
    Contains instructions on how to setup and configure a token service based on IdentityServer4, that follows the quick-start guides, keeping only the absolutely minimum requirements for this tutorial
  • ASP.NET Core API
    An API configured to use IdentityServer4 as a middleware that adds the spec compliant OpenID Connect and OAuth 2.0 endpoints
  • Client (API Consumer)
    For this post, just a Console Application that consumes a protected resource from the API

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