Commits on Jun 29, 2022

1. Improve error msg when client fails to auth in Teleport (#12677) …

   When the client connects to teleport with invalid credentials (eg
   expired ones) it will retry multiple times until the context deadline is
   reached.
   When it happens, we receive the generic error: context deadline
   exceeded.
   However, we can ask for the latest connection error, one which will give
   us more information on why it happened.
   To ask for this extra error we need to add the following
   grpc.DialOption: grpc.WithReturnConnectionError()
   
   After doing this, we will get the errors that happenned when trying to
   connect to the grpc Server.
   
   This should help us debug possible connection problems.
   
   We had to refactor a little bit the way we handle the parallel
   connection attempts to receive all the connection errors from the
   multiple flows.

   

   marcoandredinis committed Jun 29, 2022
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