diff --git a/src/v1beta1/binauthz_management_service_v1_beta1_client.ts b/src/v1beta1/binauthz_management_service_v1_beta1_client.ts
index ac21acf..a2d3bc8 100644
--- a/src/v1beta1/binauthz_management_service_v1_beta1_client.ts
+++ b/src/v1beta1/binauthz_management_service_v1_beta1_client.ts
@@ -319,7 +319,7 @@ export class BinauthzManagementServiceV1Beta1Client {
   // -- Service calls --
   // -------------------
   getPolicy(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IGetPolicyRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IGetPolicyRequest,
     options?: CallOptions
   ): Promise<
     [
@@ -381,7 +381,7 @@ export class BinauthzManagementServiceV1Beta1Client {
    * const [response] = await client.getPolicy(request);
    */
   getPolicy(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IGetPolicyRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IGetPolicyRequest,
     optionsOrCallback?:
       | CallOptions
       | Callback<
@@ -427,7 +427,7 @@ export class BinauthzManagementServiceV1Beta1Client {
     return this.innerApiCalls.getPolicy(request, options, callback);
   }
   updatePolicy(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IUpdatePolicyRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IUpdatePolicyRequest,
     options?: CallOptions
   ): Promise<
     [
@@ -488,7 +488,7 @@ export class BinauthzManagementServiceV1Beta1Client {
    * const [response] = await client.updatePolicy(request);
    */
   updatePolicy(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IUpdatePolicyRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IUpdatePolicyRequest,
     optionsOrCallback?:
       | CallOptions
       | Callback<
@@ -534,7 +534,7 @@ export class BinauthzManagementServiceV1Beta1Client {
     return this.innerApiCalls.updatePolicy(request, options, callback);
   }
   createAttestor(
-    request: protos.google.cloud.binaryauthorization.v1beta1.ICreateAttestorRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.ICreateAttestorRequest,
     options?: CallOptions
   ): Promise<
     [
@@ -601,7 +601,7 @@ export class BinauthzManagementServiceV1Beta1Client {
    * const [response] = await client.createAttestor(request);
    */
   createAttestor(
-    request: protos.google.cloud.binaryauthorization.v1beta1.ICreateAttestorRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.ICreateAttestorRequest,
     optionsOrCallback?:
       | CallOptions
       | Callback<
@@ -647,7 +647,7 @@ export class BinauthzManagementServiceV1Beta1Client {
     return this.innerApiCalls.createAttestor(request, options, callback);
   }
   getAttestor(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IGetAttestorRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IGetAttestorRequest,
     options?: CallOptions
   ): Promise<
     [
@@ -703,7 +703,7 @@ export class BinauthzManagementServiceV1Beta1Client {
    * const [response] = await client.getAttestor(request);
    */
   getAttestor(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IGetAttestorRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IGetAttestorRequest,
     optionsOrCallback?:
       | CallOptions
       | Callback<
@@ -749,7 +749,7 @@ export class BinauthzManagementServiceV1Beta1Client {
     return this.innerApiCalls.getAttestor(request, options, callback);
   }
   updateAttestor(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IUpdateAttestorRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IUpdateAttestorRequest,
     options?: CallOptions
   ): Promise<
     [
@@ -808,7 +808,7 @@ export class BinauthzManagementServiceV1Beta1Client {
    * const [response] = await client.updateAttestor(request);
    */
   updateAttestor(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IUpdateAttestorRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IUpdateAttestorRequest,
     optionsOrCallback?:
       | CallOptions
       | Callback<
@@ -854,7 +854,7 @@ export class BinauthzManagementServiceV1Beta1Client {
     return this.innerApiCalls.updateAttestor(request, options, callback);
   }
   deleteAttestor(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IDeleteAttestorRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IDeleteAttestorRequest,
     options?: CallOptions
   ): Promise<
     [
@@ -910,7 +910,7 @@ export class BinauthzManagementServiceV1Beta1Client {
    * const [response] = await client.deleteAttestor(request);
    */
   deleteAttestor(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IDeleteAttestorRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IDeleteAttestorRequest,
     optionsOrCallback?:
       | CallOptions
       | Callback<
@@ -957,7 +957,7 @@ export class BinauthzManagementServiceV1Beta1Client {
   }
 
   listAttestors(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IListAttestorsRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IListAttestorsRequest,
     options?: CallOptions
   ): Promise<
     [
@@ -1019,7 +1019,7 @@ export class BinauthzManagementServiceV1Beta1Client {
    *   for more details and examples.
    */
   listAttestors(
-    request: protos.google.cloud.binaryauthorization.v1beta1.IListAttestorsRequest,
+    request?: protos.google.cloud.binaryauthorization.v1beta1.IListAttestorsRequest,
     optionsOrCallback?:
       | CallOptions
       | PaginationCallback<