error: future cannot be shared between threads safely
  --> /home/tux/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/oauth2-5.0.0/src/reqwest_client.rs:16:9
   |
16 | /         Box::pin(async move {
17 | |             let response = self
18 | |                 .execute(request.try_into().map_err(Box::new)?)
19 | |                 .await
...  |
35 | |                 .map_err(HttpClientError::Http)
36 | |         })
   | |__________^ future created by async block is not `Sync`
   |
   = note: consider using `--verbose` to print the full type name to the console
   = help: the trait `Sync` is not implemented for `dyn Future<Output = Result<Response<...>, ...>> + Send`
note: future is not `Sync` as it awaits another future which is not `Sync`
  --> /home/tux/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/oauth2-5.0.0/src/reqwest_client.rs:17:28
   |
17 |               let response = self
   |  ____________________________^
18 | |                 .execute(request.try_into().map_err(Box::new)?)
   | |_______________________________________________________________^ await occurs here on type `impl Future<Output = std::result::Result<reqwest::Response, reqwest::Error>>`, which is not `Sync`
   = note: required for the cast from `Pin<Box<...>>` to `Pin<Box<dyn Future<Output = Result<..., ...>> + Send + Sync>>`

error: could not compile `oauth2` (lib) due to 1 previous error