tinder??

so i want to start by saying i trust my husband, he’s not the type to cheat i don’t believe. but this morning we had to switch phones because his was dying. when i opened his texts to text him about something i saw a text that said “your account verification code is 62527 for tinder (account kit facebook)” when i asked him about it he said he doesn’t know why he got it, hasn’t had tinder since we got these new phones, and maybe someone accidentally used his number for something. but that sounds super sketchy to me. idk anything about it nor have i even heard of account kit. but does this mean he downloaded tinder and is just hiding it??