chore(signature-v4-multi-region): de-async getSigV4a owing to containers

Author: siddsriv

Diff for: packages/signature-v4-multi-region/src/SignatureV4MultiRegion.ts

@@ -9,8 +9,8 @@ import {
   RequestSigningArguments,
 } from "@smithy/types";
 
-import { OptionalSigV4aSigner, signatureV4aContainer } from "./signature-v4a-container";
 import { OptionalCrtSignerV4, signatureV4CrtContainer } from "./signature-v4-crt-container";
+import { OptionalSigV4aSigner, signatureV4aContainer } from "./signature-v4a-container";
 
 /**
  * @internal
@@ -39,8 +39,7 @@ export class SignatureV4MultiRegion implements RequestPresigner, RequestSigner {
 
   public async sign(requestToSign: HttpRequest, options: RequestSigningArguments = {}): Promise<HttpRequest> {
     if (options.signingRegion === "*") {
-      const signer = await this.getSigv4aSigner();
-      return signer.sign(requestToSign, options);
+      return this.getSigv4aSigner().sign(requestToSign, options);
     }
     return this.sigv4Signer.sign(requestToSign, options);
   }
@@ -54,16 +53,14 @@ export class SignatureV4MultiRegion implements RequestPresigner, RequestSigner {
     options: RequestSigningArguments = {}
   ): Promise<HttpRequest> {
     if (options.signingRegion === "*") {
-      const signer = await this.getSigv4aSigner();
-      return signer.signWithCredentials(requestToSign, credentials, options);
+      return this.getSigv4aSigner().signWithCredentials(requestToSign, credentials, options);
     }
     return this.sigv4Signer.signWithCredentials(requestToSign, credentials, options);
   }
 
   public async presign(originalRequest: HttpRequest, options: RequestPresigningArguments = {}): Promise<HttpRequest> {
     if (options.signingRegion === "*") {
-      const signer = await this.getSigv4aSigner();
-      return signer.presign(originalRequest, options);
+      return this.getSigv4aSigner().presign(originalRequest, options);
     }
     return this.sigv4Signer.presign(originalRequest, options);
   }
@@ -79,7 +76,7 @@ export class SignatureV4MultiRegion implements RequestPresigner, RequestSigner {
     return this.sigv4Signer.presignWithCredentials(originalRequest, credentials, options);
   }
 
-  private async getSigv4aSigner(): Promise<InstanceType<OptionalCrtSignerV4> | InstanceType<OptionalSigV4aSigner>> {
+  private getSigv4aSigner(): InstanceType<OptionalCrtSignerV4> | InstanceType<OptionalSigV4aSigner> {
     if (!this.sigv4aSigner) {
       if (signatureV4CrtContainer.CrtSignerV4) {
         // CRT implementation