Regenerate docs. (#696)

diff --git a/docs/epy/googleapiclient._auth-module.html b/docs/epy/googleapiclient._auth-module.html
index 117364b..3d9bdaf 100644
--- a/docs/epy/googleapiclient._auth-module.html
+++ b/docs/epy/googleapiclient._auth-module.html
@@ -130,6 +130,71 @@
       
     </td>
   </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a name="refresh_credentials"></a><span class="summary-sig-name">refresh_credentials</span>(<span class="summary-sig-arg">credentials</span>)</span></td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="googleapiclient._auth-pysrc.html#refresh_credentials">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a name="apply_credentials"></a><span class="summary-sig-name">apply_credentials</span>(<span class="summary-sig-arg">credentials</span>,
+        <span class="summary-sig-arg">headers</span>)</span></td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="googleapiclient._auth-pysrc.html#apply_credentials">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a name="is_valid"></a><span class="summary-sig-name">is_valid</span>(<span class="summary-sig-arg">credentials</span>)</span></td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="googleapiclient._auth-pysrc.html#is_valid">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a name="get_credentials_from_http"></a><span class="summary-sig-name">get_credentials_from_http</span>(<span class="summary-sig-arg">http</span>)</span></td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="googleapiclient._auth-pysrc.html#get_credentials_from_http">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
 </table>
 <!-- ==================== VARIABLES ==================== -->
 <a name="section-Variables"></a>
@@ -159,6 +224,13 @@
     <td width="15%" align="right" valign="top" class="summary">
       <span class="summary-type">&nbsp;</span>
     </td><td class="summary">
+        <a name="google_auth_httplib2"></a><span class="summary-name">google_auth_httplib2</span> = <code title="None">None</code>
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
         <a name="HAS_OAUTH2CLIENT"></a><span class="summary-name">HAS_OAUTH2CLIENT</span> = <code title="False">False</code>
     </td>
   </tr>
@@ -272,7 +344,7 @@
 <table border="0" cellpadding="0" cellspacing="0" width="100%%">
   <tr>
     <td align="left" class="footer">
-    Generated by Epydoc 3.0.1 on Mon Jun  5 13:38:39 2017
+    Generated by Epydoc 3.0.1 on Fri Jun 14 13:09:01 2019
     </td>
     <td align="right" class="footer">
       <a target="mainFrame" href="http://epydoc.sourceforge.net"