fix: replace Arc<Box<...>> credential-provider with Arc<...> (#164)

* replace Arc<Box<...>> provider with Arc<...>
* remove need for caller to Box provider

examples/common.rs

@@ -16,7 +16,7 @@ pub fn create_client_on_play() -> Result<Client, Box<dyn std::error::Error + Sen
     );
 
     let client = ClientBuilder::new(base_url.clone())
-        .provider(Some(Box::new(static_provider)))
+        .provider(Some(static_provider))
         .build()?;
     Ok(client)
 }
@@ -29,7 +29,7 @@ pub fn create_client_on_localhost() -> Result<Client, Box<dyn std::error::Error
     let static_provider = StaticProvider::new("minioadmin", "minioadmin", None);
 
     let client = ClientBuilder::new(base_url.clone())
-        .provider(Some(Box::new(static_provider)))
+        .provider(Some(static_provider))
         .build()?;
     Ok(client)
 }

examples/object_prompt.rs

@@ -35,7 +35,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     let static_provider = StaticProvider::new("admin", "admin", None);
 
     let client = ClientBuilder::new(base_url.clone())
-        .provider(Some(Box::new(static_provider)))
+        .provider(Some(static_provider))
         .ignore_cert_check(Some(true))
         .build()?;
 

examples/put_object.rs

@@ -42,7 +42,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     );
 
     let client: Client = ClientBuilder::new("https://play.min.io".parse()?)
-        .provider(Some(Box::new(static_provider)))
+        .provider(Some(static_provider))
         .build()?;
 
     let resp: BucketExistsResponse = client.bucket_exists(&args.bucket).send().await.unwrap();