fix(auth): optimise user sessions (#7199)

* fix(auth): start optimise user sessions

* reduce and query user sessions directly without gorm statements

* cleanup

* cleanup

* fix requested changes

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Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/auth/repository/eventsourcing/handler/token.go

@@ -244,7 +244,8 @@ func agentIDFromSession(event eventstore.Event) (string, error) {
 		logging.WithError(err).Error("could not unmarshal event data")
 		return "", zerrors.ThrowInternal(nil, "MODEL-sd325", "could not unmarshal data")
 	}
-	return session["userAgentID"].(string), nil
+	agentID, _ := session["userAgentID"].(string)
+	return agentID, nil
 }
 
 func applicationFromSession(event eventstore.Event) (*project_es_model.Application, error) {