Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="analytics_v3.html">Google Analytics API</a> . <a href="analytics_v3.userDeletion.html">userDeletion</a> . <a href="analytics_v3.userDeletion.userDeletionRequest.html">userDeletionRequest</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#upsert">upsert(body)</a></code></p>
+<p class="firstline">Insert or update a user deletion requests.</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="upsert">upsert(body)</code>
+  <pre>Insert or update a user deletion requests.
+
+Args:
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # JSON template for a user deletion request resource.
+    "deletionRequestTime": "A String", # This marks the point in time for which all user data before should be deleted
+    "kind": "analytics#userDeletionRequest", # Value is "analytics#userDeletionRequest".
+    "firebaseProjectId": "A String", # Firebase Project Id
+    "id": { # User ID.
+      "userId": "A String", # The User's id
+      "type": "A String", # Type of user
+    },
+    "webPropertyId": "A String", # Web property ID of the form UA-XXXXX-YY.
+  }
+
+
+Returns:
+  An object of the form:
+
+    { # JSON template for a user deletion request resource.
+      "deletionRequestTime": "A String", # This marks the point in time for which all user data before should be deleted
+      "kind": "analytics#userDeletionRequest", # Value is "analytics#userDeletionRequest".
+      "firebaseProjectId": "A String", # Firebase Project Id
+      "id": { # User ID.
+        "userId": "A String", # The User's id
+        "type": "A String", # Type of user
+      },
+      "webPropertyId": "A String", # Web property ID of the form UA-XXXXX-YY.
+    }</pre>
+</div>
+
+</body></html>
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