Improve 2FA Token Missing Logging

[t0rb3n]

We see a lot of
[error][ERROR] 2FA token not provided in our logs without being able to map this to a specific user.

My suggestion is to improve logging in src/api/idenitity.rs

vaultwarden/src/api/identity.rs

Line 505 in f05398a

None => err_json!(_json_err_twofactor(&twofactor_ids, &user.uuid, conn).await?, "2FA token not provided"),

by appending the same output as password login failed, e.g. format!("IP: {}. Username: {}.", ip.ip, username) (Copied from

vaultwarden/src/api/identity.rs

Line 158 in f05398a

None => err!("Username or password is incorrect. Try again", format!("IP: {}. Username: {}.", ip.ip, username)),

)

So that line could become something like this:
None => err_json!(_json_err_twofactor(&twofactor_ids, &user.uuid, conn).await?, "2FA token not provided ", format!("IP: {}. Username: {}.", ip.ip, user.username)), (Not sure what properties in user exists)

[prov3it]

I agree.