Is "2FA token not provided" actually an error?

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We set up monitoring for all of our services recently. This includes alerts when applications log errors.

We noticed the following error message coming up from time to time:

{"log":"[2022-02-08 09:41:41.405][error][ERROR] 2FA token not provided\n","stream":"stdout","time":"2022-02-08T09:41:41.405199993Z"}
{"log":"[2022-02-08 08:06:48.318][error][ERROR] 2FA token not provided\n","stream":"stdout","time":"2022-02-08T08:06:48.319067451Z"}
{"log":"[2022-02-07 14:26:22.730][error][ERROR] 2FA token not provided\n","stream":"stdout","time":"2022-02-07T14:26:22.731041467Z"}
{"log":"[2022-02-07 14:20:18.300][error][ERROR] 2FA token not provided\n","stream":"stdout","time":"2022-02-07T14:20:18.300254629Z"}
{"log":"[2022-02-07 13:06:10.604][error][ERROR] 2FA token not provided\n","stream":"stdout","time":"2022-02-07T13:06:10.605145212Z"}
{"log":"[2022-02-07 12:04:44.802][error][ERROR] 2FA token not provided\n","stream":"stdout","time":"2022-02-07T12:04:44.802560513Z"}

Now we are wondering if this is actually an error (which would indicate a misconfiguration on our side) or if this is caused when users are logging in without or with invalid 2FA tokens.

The relevant line of code seems to be src/api/identity.rs#L310 but I’m not enough of a Rust expert to fully grasp what is happening. :slight_smile:

Could you help me out and clarify what the error means and when it occurs?

Thank you in advance!
Niels