M2M apps use the Client Credentials Flow , in which they pass their Client ID and Client Secret to authenticate themselves and get an access token which can be used to make an api call to resource server .
Steps
- App authenticates with the Authorization Server(token end point) .Client ID and Client Secret are passed as paramters.
- Authorization Server validates the Client ID and Client Secret.
- Authorization Server responds with an access Token.
- App uses the Access Token to call an API on resource server.
- The API responds with requested data.