docs: docs update (#911)

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
- [ ] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/google-api-python-client/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)

Fixes #<issue_number_goes_here> 🦕
diff --git a/docs/dyn/apigee_v1.hybrid.issuers.html b/docs/dyn/apigee_v1.hybrid.issuers.html
new file mode 100644
index 0000000..c837808
--- /dev/null
+++ b/docs/dyn/apigee_v1.hybrid.issuers.html
@@ -0,0 +1,110 @@
+<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.hybrid.html">hybrid</a> . <a href="apigee_v1.hybrid.issuers.html">issuers</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#list">list(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Lists hybrid services and its trusted issuers service account ids.</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="list">list(name, x__xgafv=None)</code>
+  <pre>Lists hybrid services and its trusted issuers service account ids.
+This api is authenticated and unauthorized(allow all the users) and used by
+runtime authn-authz service to query control plane&#x27;s issuer service account
+ids.
+
+Args:
+  name: string, Required. Must be of the form `hybrid/issuers`. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    {
+    &quot;issuers&quot;: [ # Lists of hybrid services and its trusted issuer email ids.
+      {
+        &quot;emailIds&quot;: [ # List of trusted issuer email ids.
+          &quot;A String&quot;,
+        ],
+        &quot;service&quot;: &quot;A String&quot;, # String indicating the Apigee service name.
+      },
+    ],
+  }</pre>
+</div>
+
+</body></html>
\ No newline at end of file