chore: regens API reference docs (#889)

diff --git a/docs/dyn/adexchangebuyer2_v2beta1.accounts.clients.html b/docs/dyn/adexchangebuyer2_v2beta1.accounts.clients.html
index 7118cf9..8494420 100644
--- a/docs/dyn/adexchangebuyer2_v2beta1.accounts.clients.html
+++ b/docs/dyn/adexchangebuyer2_v2beta1.accounts.clients.html
@@ -85,7 +85,7 @@
 <p class="firstline">Returns the users Resource.</p>
 
 <p class="toc_element">
-  <code><a href="#create">create(accountId, body, x__xgafv=None)</a></code></p>
+  <code><a href="#create">create(accountId, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Creates a new client buyer.</p>
 <p class="toc_element">
   <code><a href="#get">get(accountId, clientAccountId, x__xgafv=None)</a></code></p>
@@ -97,20 +97,20 @@
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <p class="toc_element">
-  <code><a href="#update">update(accountId, clientAccountId, body, x__xgafv=None)</a></code></p>
+  <code><a href="#update">update(accountId, clientAccountId, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Updates an existing client buyer.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(accountId, body, x__xgafv=None)</code>
+    <code class="details" id="create">create(accountId, body=None, x__xgafv=None)</code>
   <pre>Creates a new client buyer.
 
 Args:
   accountId: string, Unique numerical account ID for the buyer of which the client buyer
 is a customer; the sponsor buyer to create a client for. (required) (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
-{ # A client resource represents a client buyer&mdash;an agency, a brand, or an
+{ # A client resource represents a client buyer&amp;mdash;an agency, a brand, or an
       # advertiser customer of the sponsor buyer. Users associated with the client
       # buyer have restricted access to the Marketplace and certain other sections of
       # the Authorized Buyers UI based on the role granted to the client buyer. All
@@ -118,10 +118,6 @@
     "status": "A String", # The status of the client buyer.
     "clientAccountId": "A String", # The globally-unique numerical ID of the client.
         # The value of this field is ignored in create and update operations.
-    "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
-    "entityName": "A String", # The name of the entity. This field is automatically fetched based on
-        # the type and ID.
-        # The value of this field is ignored in create and update operations.
     "partnerClientId": "A String", # Optional arbitrary unique identifier of this client buyer from the
         # standpoint of its Ad Exchange sponsor buyer.
         # 
@@ -132,6 +128,10 @@
         # 
         # If present, must be unique among all the client buyers for its
         # Ad Exchange sponsor buyer.
+    "entityName": "A String", # The name of the entity. This field is automatically fetched based on
+        # the type and ID.
+        # The value of this field is ignored in create and update operations.
+    "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
     "role": "A String", # The role which is assigned to the client buyer. Each role implies a set of
         # permissions granted to the client. Must be one of `CLIENT_DEAL_VIEWER`,
         # `CLIENT_DEAL_NEGOTIATOR` or `CLIENT_DEAL_APPROVER`.
@@ -166,7 +166,7 @@
 Returns:
   An object of the form:
 
-    { # A client resource represents a client buyer&mdash;an agency, a brand, or an
+    { # A client resource represents a client buyer&amp;mdash;an agency, a brand, or an
         # advertiser customer of the sponsor buyer. Users associated with the client
         # buyer have restricted access to the Marketplace and certain other sections of
         # the Authorized Buyers UI based on the role granted to the client buyer. All
@@ -174,10 +174,6 @@
       "status": "A String", # The status of the client buyer.
       "clientAccountId": "A String", # The globally-unique numerical ID of the client.
           # The value of this field is ignored in create and update operations.
-      "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
-      "entityName": "A String", # The name of the entity. This field is automatically fetched based on
-          # the type and ID.
-          # The value of this field is ignored in create and update operations.
       "partnerClientId": "A String", # Optional arbitrary unique identifier of this client buyer from the
           # standpoint of its Ad Exchange sponsor buyer.
           #
@@ -188,6 +184,10 @@
           #
           # If present, must be unique among all the client buyers for its
           # Ad Exchange sponsor buyer.
+      "entityName": "A String", # The name of the entity. This field is automatically fetched based on
+          # the type and ID.
+          # The value of this field is ignored in create and update operations.
+      "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
       "role": "A String", # The role which is assigned to the client buyer. Each role implies a set of
           # permissions granted to the client. Must be one of `CLIENT_DEAL_VIEWER`,
           # `CLIENT_DEAL_NEGOTIATOR` or `CLIENT_DEAL_APPROVER`.
@@ -230,7 +230,7 @@
 Returns:
   An object of the form:
 
-    { # A client resource represents a client buyer&mdash;an agency, a brand, or an
+    { # A client resource represents a client buyer&amp;mdash;an agency, a brand, or an
         # advertiser customer of the sponsor buyer. Users associated with the client
         # buyer have restricted access to the Marketplace and certain other sections of
         # the Authorized Buyers UI based on the role granted to the client buyer. All
@@ -238,10 +238,6 @@
       "status": "A String", # The status of the client buyer.
       "clientAccountId": "A String", # The globally-unique numerical ID of the client.
           # The value of this field is ignored in create and update operations.
-      "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
-      "entityName": "A String", # The name of the entity. This field is automatically fetched based on
-          # the type and ID.
-          # The value of this field is ignored in create and update operations.
       "partnerClientId": "A String", # Optional arbitrary unique identifier of this client buyer from the
           # standpoint of its Ad Exchange sponsor buyer.
           #
@@ -252,6 +248,10 @@
           #
           # If present, must be unique among all the client buyers for its
           # Ad Exchange sponsor buyer.
+      "entityName": "A String", # The name of the entity. This field is automatically fetched based on
+          # the type and ID.
+          # The value of this field is ignored in create and update operations.
+      "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
       "role": "A String", # The role which is assigned to the client buyer. Each role implies a set of
           # permissions granted to the client. Must be one of `CLIENT_DEAL_VIEWER`,
           # `CLIENT_DEAL_NEGOTIATOR` or `CLIENT_DEAL_APPROVER`.
@@ -312,7 +312,7 @@
         # accounts.clients.list
         # method to retrieve the next page of results.
     "clients": [ # The returned list of clients.
-      { # A client resource represents a client buyer&mdash;an agency, a brand, or an
+      { # A client resource represents a client buyer&amp;mdash;an agency, a brand, or an
             # advertiser customer of the sponsor buyer. Users associated with the client
             # buyer have restricted access to the Marketplace and certain other sections of
             # the Authorized Buyers UI based on the role granted to the client buyer. All
@@ -320,10 +320,6 @@
           "status": "A String", # The status of the client buyer.
           "clientAccountId": "A String", # The globally-unique numerical ID of the client.
               # The value of this field is ignored in create and update operations.
-          "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
-          "entityName": "A String", # The name of the entity. This field is automatically fetched based on
-              # the type and ID.
-              # The value of this field is ignored in create and update operations.
           "partnerClientId": "A String", # Optional arbitrary unique identifier of this client buyer from the
               # standpoint of its Ad Exchange sponsor buyer.
               #
@@ -334,6 +330,10 @@
               #
               # If present, must be unique among all the client buyers for its
               # Ad Exchange sponsor buyer.
+          "entityName": "A String", # The name of the entity. This field is automatically fetched based on
+              # the type and ID.
+              # The value of this field is ignored in create and update operations.
+          "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
           "role": "A String", # The role which is assigned to the client buyer. Each role implies a set of
               # permissions granted to the client. Must be one of `CLIENT_DEAL_VIEWER`,
               # `CLIENT_DEAL_NEGOTIATOR` or `CLIENT_DEAL_APPROVER`.
@@ -378,17 +378,17 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(accountId, clientAccountId, body, x__xgafv=None)</code>
+    <code class="details" id="update">update(accountId, clientAccountId, body=None, x__xgafv=None)</code>
   <pre>Updates an existing client buyer.
 
 Args:
   accountId: string, Unique numerical account ID for the buyer of which the client buyer
 is a customer; the sponsor buyer to update a client for. (required) (required)
   clientAccountId: string, Unique numerical account ID of the client to update. (required) (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
-{ # A client resource represents a client buyer&mdash;an agency, a brand, or an
+{ # A client resource represents a client buyer&amp;mdash;an agency, a brand, or an
       # advertiser customer of the sponsor buyer. Users associated with the client
       # buyer have restricted access to the Marketplace and certain other sections of
       # the Authorized Buyers UI based on the role granted to the client buyer. All
@@ -396,10 +396,6 @@
     "status": "A String", # The status of the client buyer.
     "clientAccountId": "A String", # The globally-unique numerical ID of the client.
         # The value of this field is ignored in create and update operations.
-    "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
-    "entityName": "A String", # The name of the entity. This field is automatically fetched based on
-        # the type and ID.
-        # The value of this field is ignored in create and update operations.
     "partnerClientId": "A String", # Optional arbitrary unique identifier of this client buyer from the
         # standpoint of its Ad Exchange sponsor buyer.
         # 
@@ -410,6 +406,10 @@
         # 
         # If present, must be unique among all the client buyers for its
         # Ad Exchange sponsor buyer.
+    "entityName": "A String", # The name of the entity. This field is automatically fetched based on
+        # the type and ID.
+        # The value of this field is ignored in create and update operations.
+    "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
     "role": "A String", # The role which is assigned to the client buyer. Each role implies a set of
         # permissions granted to the client. Must be one of `CLIENT_DEAL_VIEWER`,
         # `CLIENT_DEAL_NEGOTIATOR` or `CLIENT_DEAL_APPROVER`.
@@ -444,7 +444,7 @@
 Returns:
   An object of the form:
 
-    { # A client resource represents a client buyer&mdash;an agency, a brand, or an
+    { # A client resource represents a client buyer&amp;mdash;an agency, a brand, or an
         # advertiser customer of the sponsor buyer. Users associated with the client
         # buyer have restricted access to the Marketplace and certain other sections of
         # the Authorized Buyers UI based on the role granted to the client buyer. All
@@ -452,10 +452,6 @@
       "status": "A String", # The status of the client buyer.
       "clientAccountId": "A String", # The globally-unique numerical ID of the client.
           # The value of this field is ignored in create and update operations.
-      "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
-      "entityName": "A String", # The name of the entity. This field is automatically fetched based on
-          # the type and ID.
-          # The value of this field is ignored in create and update operations.
       "partnerClientId": "A String", # Optional arbitrary unique identifier of this client buyer from the
           # standpoint of its Ad Exchange sponsor buyer.
           #
@@ -466,6 +462,10 @@
           #
           # If present, must be unique among all the client buyers for its
           # Ad Exchange sponsor buyer.
+      "entityName": "A String", # The name of the entity. This field is automatically fetched based on
+          # the type and ID.
+          # The value of this field is ignored in create and update operations.
+      "entityType": "A String", # The type of the client entity: `ADVERTISER`, `BRAND`, or `AGENCY`.
       "role": "A String", # The role which is assigned to the client buyer. Each role implies a set of
           # permissions granted to the client. Must be one of `CLIENT_DEAL_VIEWER`,
           # `CLIENT_DEAL_NEGOTIATOR` or `CLIENT_DEAL_APPROVER`.