fix: Update auth resolver async flow to add user agent details after resolving identity (#3747)

Author: muhammad-othman

generator/.DevConfigs/9c63240f-0f30-4c8e-b0a7-e434529126fd.json

@@ -0,0 +1,9 @@
+{
+  "core": {
+    "changeLogMessages": [
+      "fix: Update auth resolver async flow to add user agent details after resolving identity"
+    ],
+    "type": "patch",
+    "updateMinimum": true
+  }
+}

sdk/src/Core/Amazon.Runtime/Pipeline/Handlers/BaseAuthResolverHandler.cs

@@ -162,7 +162,7 @@ protected async Task PreInvokeAsync(IExecutionContext executionContext)
                     {
                         // We can use DefaultAWSCredentials if it was set by the user for these schemes.
                         executionContext.RequestContext.Identity = clientConfig.DefaultAWSCredentials;
-                        return;
+                        break;
                     }
 
                     if (scheme is BearerAuthScheme && clientConfig.AWSTokenProvider != null)
@@ -178,7 +178,7 @@ protected async Task PreInvokeAsync(IExecutionContext executionContext)
                         }
 
                         executionContext.RequestContext.Identity = resolvedToken.Value;
-                        return;
+                        break;
                     }
 
                     var identityResolver = scheme.GetIdentityResolver(clientConfig.IdentityResolverConfiguration);
@@ -188,7 +188,7 @@ protected async Task PreInvokeAsync(IExecutionContext executionContext)
 
                     if (executionContext.RequestContext.Identity != null)
                     {
-                        return;
+                        break;
                     }
                 }
                 catch (Exception ex)