Move import behind aws-auth feature flag

Author: JamieTsai1024

src/client/csfle/state_machine.rs

@@ -18,12 +18,7 @@ use tokio::{
 };
 
 use crate::{
-    client::{
-        auth::aws::get_aws_credentials,
-        csfle::options::KmsProvidersTlsOptions,
-        options::ServerAddress,
-        WeakClient,
-    },
+    client::{csfle::options::KmsProvidersTlsOptions, options::ServerAddress, WeakClient},
     error::{Error, Result},
     operation::{run_command::RunCommand, RawOutput},
     options::ReadConcern,
@@ -255,7 +250,10 @@ impl CryptExecutor {
                             KmsProviderType::Aws => {
                                 #[cfg(feature = "aws-auth")]
                                 {
-                                    use crate::client::auth::Credential;
+                                    use crate::client::auth::{
+                                        aws::get_aws_credentials,
+                                        Credential,
+                                    };
 
                                     // Original implementation using the AWS SDK
                                     let aws_creds =