1 files changed, 2 insertions(+), 1 deletions(-)

M downstream.go

@@ 666,6 666,7 @@ func (dc *downstreamConn) handleMessageUnregistered(ctx context.Context, msg *ir
 			}
 
 			if err = auth.AuthPlain(ctx, dc.srv.db, username, password); err != nil {
+				err = fmt.Errorf("%v (username %q)", err, username)
 				break
 			}
 		case "OAUTHBEARER":


@@ 681,7 682,7 @@ func (dc *downstreamConn) handleMessageUnregistered(ctx context.Context, msg *ir
 			}
 
 			if credentials.oauthBearer.Username != "" && credentials.oauthBearer.Username != username {
-				err = fmt.Errorf("username mismatch (server returned %q)", username)
+				err = fmt.Errorf("username mismatch (client provided %q, but server returned %q)", credentials.oauthBearer.Username, username)
 				break
 			}
 		default: