fix incorrect connection message

Author: yuxianrz

packages/core/src/codewhisperer/ui/codeWhispererNodes.ts

@@ -192,7 +192,11 @@ export function createManageSubscription(): DataQuickPickItem<'manageSubscriptio
 export function createSignout(): DataQuickPickItem<'signout'> {
     const label = localize('AWS.codewhisperer.signoutNode.label', 'Sign Out')
     const icon = getIcon('vscode-export')
-    const connection = AuthUtil.instance.isBuilderIdConnection() ? 'AWS Builder ID' : 'IAM Identity Center'
+    const connection = AuthUtil.instance.isIamConnection()
+        ? 'IAM Credentials'
+        : AuthUtil.instance.isBuilderIdConnection()
+          ? 'AWS Builder ID'
+          : 'IAM Identity Center'
 
     return {
         data: 'signout',

packages/core/src/codewhisperer/util/authUtil.ts

@@ -277,6 +277,10 @@ export class AuthUtil implements IAuthProvider {
         return Boolean(this.connection?.startUrl && this.connection?.startUrl !== builderIdStartUrl)
     }
 
+    isIamConnection() {
+        return Boolean(this.connection?.accessKey && this.connection?.secretKey)
+    }
+
     isInternalAmazonUser(): boolean {
         return this.isConnected() && this.connection?.startUrl === internalStartUrl
     }