If no refreshToken return, maybe the old refreshToken still available #177

Flutter Tests ✅

Report	Passed	Time
test-report-contact.json	2✅	12s
test-report-core.json	25✅	21s
test-report-default.json	72✅	61s
test-report-fcm.json	2✅	13s
test-report-forward.json	2✅	12s
test-report-model.json	72✅	63s
test-report-rule_filter.json	3✅	21s