Authentication error after migrating from 2.1.3 to 3.0.1

Request Type

Bug

Work Environment

Problem Description

After changing the Docker image version to 3.0.1 and modifying the configuration according to this guide, it is not possible to login to Cortex. We are using LDAP integration, and it was working OK with the previous version. Checking the logs, there are some warnings and the attached Error. The issue seems related to Cortex not being able to perform an API request to /api/user/current.

Steps to Reproduce

1. Migrate a working Cortex setup running on 2.1.3 to 3.0.1 version

Complementary information

[error] o.e.s.a.MultiAuthSrv - Authentication failure
org.elastic4play.AuthenticationError: Authentication using API key is not supported
at org.elastic4play.services.AuthSrv.authenticate(UserSrv.scala:50)
at org.elastic4play.services.AuthSrv.authenticate$(UserSrv.scala:49)
at org.elastic4play.services.auth.LdapAuthSrv.authenticate(LdapAuthSrv.scala:99)
at org.elastic4play.services.auth.MultiAuthSrv.$anonfun$authenticate$3(MultiAuthSrv.scala:58)
at org.elastic4play.services.auth.MultiAuthSrv$$anonfun$$nestedInanonfun$forAllAuthProvider$1$1.applyOrElse(MultiAuthSrv.scala:43)
at org.elastic4play.services.auth.MultiAuthSrv$$anonfun$$nestedInanonfun$forAllAuthProvider$1$1.applyOrElse(MultiAuthSrv.scala:41)
at scala.concurrent.Future.$anonfun$recoverWith$1(Future.scala:417)
at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:41)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
[info] o.t.c.s.ErrorHandler - GET /api/user/current returned 500

Start by reproducing the 2.1.3 to 3.0.1 migration described in the issue and inspect the /api/user/current failure. Read UserSrv.scala, LdapAuthSrv.scala, and MultiAuthSrv.scala around the reported authentication error. Done means LDAP users can log in after migration and /api/user/current no longer returns 500.