handle build warning

[softboyjimbo]

Handle the following warning:

=> [build 11/11] RUN cargo build --release                                                                                                                                 4.0s
 => => #     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 => => #     |
 => => #     = note: this `Result` may be an `Err` variant, which should be handled
 => => #     = note: `#[warn(unused_must_use)]` on by default
 => => #     = note: this warning originates in the macro `$crate::join` which comes from the expansion of the macro `tokio::join` (in Nightly builds, run with -Z macro-backtra
 => => # ce for more info)

[Czechh]

You can also verify these with cargo clippy