minor fixes

Author: PavelSafronov

src/aws4.ts

@@ -42,9 +42,6 @@ const convertHeaderValue = (value: string | number) => {
 /**
  * This method implements AWS Signature 4 logic for a very specific request format.
  * The signing logic is described here: https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_sigv-create-signed-request.html
- * @param options
- * @param credentials
- * @returns
  */
 export function aws4Sign(options: Options, credentials: AWSCredentials): SignedHeaders {
   /**

src/cmap/auth/mongodb_aws.ts

@@ -63,13 +63,10 @@ export class MongoDBAWS extends AuthProvider {
     // Allow the user to specify an AWS session token for authentication with temporary credentials.
     const sessionToken = credentials.mechanismProperties.AWS_SESSION_TOKEN;
 
-    // If all three defined, include sessionToken, else include username and pass, else no credentials
-    const awsCredentials =
-      accessKeyId && secretAccessKey && sessionToken
-        ? { accessKeyId, secretAccessKey, sessionToken }
-        : accessKeyId && secretAccessKey
-          ? { accessKeyId, secretAccessKey }
-          : undefined;
+    // If all three defined, include sessionToken, else only include username and pass
+    const awsCredentials = sessionToken
+      ? { accessKeyId, secretAccessKey, sessionToken }
+      : { accessKeyId, secretAccessKey };
 
     const db = credentials.source;
     const nonce = await randomBytes(32);