docs: docs update (#911)

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Fixes #<issue_number_goes_here> 🦕
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+<html><body>
+<style>
+
+body, h1, h2, h3, div, span, p, pre, a {
+  margin: 0;
+  padding: 0;
+  border: 0;
+  font-weight: inherit;
+  font-style: inherit;
+  font-size: 100%;
+  font-family: inherit;
+  vertical-align: baseline;
+}
+
+body {
+  font-size: 13px;
+  padding: 1em;
+}
+
+h1 {
+  font-size: 26px;
+  margin-bottom: 1em;
+}
+
+h2 {
+  font-size: 24px;
+  margin-bottom: 1em;
+}
+
+h3 {
+  font-size: 20px;
+  margin-bottom: 1em;
+  margin-top: 1em;
+}
+
+pre, code {
+  line-height: 1.5;
+  font-family: Monaco, 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Lucida Console', monospace;
+}
+
+pre {
+  margin-top: 0.5em;
+}
+
+h1, h2, h3, p {
+  font-family: Arial, sans serif;
+}
+
+h1, h2, h3 {
+  border-bottom: solid #CCC 1px;
+}
+
+.toc_element {
+  margin-top: 0.5em;
+}
+
+.firstline {
+  margin-left: 2 em;
+}
+
+.method  {
+  margin-top: 1em;
+  border: solid 1px #CCC;
+  padding: 1em;
+  background: #EEE;
+}
+
+.details {
+  font-weight: bold;
+  font-size: 14px;
+}
+
+</style>
+
+<h1><a href="apigee_v1.html">Apigee API</a> . <a href="apigee_v1.organizations.html">organizations</a> . <a href="apigee_v1.organizations.developers.html">developers</a> . <a href="apigee_v1.organizations.developers.apps.html">apps</a> . <a href="apigee_v1.organizations.developers.apps.attributes.html">attributes</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#delete">delete(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Deletes a developer app attribute.</p>
+<p class="toc_element">
+  <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Returns a developer app attribute.</p>
+<p class="toc_element">
+  <code><a href="#list">list(parent, x__xgafv=None)</a></code></p>
+<p class="firstline">Returns a list of all developer app attributes.</p>
+<p class="toc_element">
+  <code><a href="#updateDeveloperAppAttribute">updateDeveloperAppAttribute(name, body=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Updates a developer app attribute.</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="delete">delete(name, x__xgafv=None)</code>
+  <pre>Deletes a developer app attribute.
+
+Args:
+  name: string, Required. Name of the developer app attribute. Use the following structure in your
+request:
+  `organizations/{org}/developers/{developer_email}/apps/{app}/attributes/{attribute}` (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Key-value pair to store extra metadata.
+    &quot;value&quot;: &quot;A String&quot;, # Value of the attribute.
+    &quot;name&quot;: &quot;A String&quot;, # API key of the attribute.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="get">get(name, x__xgafv=None)</code>
+  <pre>Returns a developer app attribute.
+
+Args:
+  name: string, Required. Name of the developer app attribute. Use the following structure in your
+request:
+  `organizations/{org}/developers/{developer_email}/apps/{app}/attributes/{attribute}` (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Key-value pair to store extra metadata.
+    &quot;value&quot;: &quot;A String&quot;, # Value of the attribute.
+    &quot;name&quot;: &quot;A String&quot;, # API key of the attribute.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(parent, x__xgafv=None)</code>
+  <pre>Returns a list of all developer app attributes.
+
+Args:
+  parent: string, Required. Name of the developer app. Use the following structure in your request:
+  `organizations/{org}/developers/{developer_email}/apps/{app}` (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    {
+      &quot;attribute&quot;: [ # List of attributes.
+        { # Key-value pair to store extra metadata.
+          &quot;value&quot;: &quot;A String&quot;, # Value of the attribute.
+          &quot;name&quot;: &quot;A String&quot;, # API key of the attribute.
+        },
+      ],
+    }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="updateDeveloperAppAttribute">updateDeveloperAppAttribute(name, body=None, x__xgafv=None)</code>
+  <pre>Updates a developer app attribute.
+
+**Note**: OAuth access tokens and Key Management Service (KMS) entities
+(apps, developers, and API products) are cached for 180 seconds
+(current default). Any custom attributes associated with these entities
+are cached for at least 180 seconds after the entity is accessed at
+runtime. Therefore, an `ExpiresIn` element on the OAuthV2 policy
+won&#x27;t be able to expire an access token in less than 180 seconds.
+
+Args:
+  name: string, Required. Name of the developer app attribute. Use the following structure in your
+request:
+  `organizations/{org}/developers/{developer_email}/apps/{app}/attributes/{attribute}` (required)
+  body: object, The request body.
+    The object takes the form of:
+
+{ # Key-value pair to store extra metadata.
+  &quot;value&quot;: &quot;A String&quot;, # Value of the attribute.
+  &quot;name&quot;: &quot;A String&quot;, # API key of the attribute.
+}
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Key-value pair to store extra metadata.
+    &quot;value&quot;: &quot;A String&quot;, # Value of the attribute.
+    &quot;name&quot;: &quot;A String&quot;, # API key of the attribute.
+  }</pre>
+</div>
+
+</body></html>
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