diff --git a/SqlAdmin/src/V1beta4/DatabaseInstance.php b/SqlAdmin/src/V1beta4/DatabaseInstance.php
index 8dbad15c96f3..23d73f832ac3 100644
--- a/SqlAdmin/src/V1beta4/DatabaseInstance.php
+++ b/SqlAdmin/src/V1beta4/DatabaseInstance.php
@@ -173,12 +173,12 @@ class DatabaseInstance extends \Google\Protobuf\Internal\Message
      */
     private $name = '';
     /**
-     * The geographical region. Can be:
-     * *  `us-central` (`FIRST_GEN` instances only)
-     * *  `us-central1` (`SECOND_GEN` instances only)
-     * *  `asia-east1` or `europe-west1`.
-     * Defaults to `us-central` or `us-central1` depending on the instance
-     * type. The region cannot be changed after instance creation.
+     * The geographical region of the Cloud SQL instance.
+     * It can be one of the
+     * [regions](https://cloud.google.com/sql/docs/mysql/locations#location-r)
+     * where Cloud SQL operates:
+     * For example,  `asia-east1`, `europe-west1`, and  `us-central1`.
+     * The default value is `us-central1`.
      *
      * Generated from protobuf field <code>string region = 24;</code>
      */
@@ -372,12 +372,12 @@ class DatabaseInstance extends \Google\Protobuf\Internal\Message
      *     @type string $name
      *           Name of the Cloud SQL instance. This does not include the project ID.
      *     @type string $region
-     *           The geographical region. Can be:
-     *           *  `us-central` (`FIRST_GEN` instances only)
-     *           *  `us-central1` (`SECOND_GEN` instances only)
-     *           *  `asia-east1` or `europe-west1`.
-     *           Defaults to `us-central` or `us-central1` depending on the instance
-     *           type. The region cannot be changed after instance creation.
+     *           The geographical region of the Cloud SQL instance.
+     *           It can be one of the
+     *           [regions](https://cloud.google.com/sql/docs/mysql/locations#location-r)
+     *           where Cloud SQL operates:
+     *           For example,  `asia-east1`, `europe-west1`, and  `us-central1`.
+     *           The default value is `us-central1`.
      *     @type string $gce_zone
      *           The Compute Engine zone that the instance is currently serving from. This
      *           value could be different from the zone that was specified when the instance
@@ -1218,12 +1218,12 @@ public function setName($var)
     }
 
     /**
-     * The geographical region. Can be:
-     * *  `us-central` (`FIRST_GEN` instances only)
-     * *  `us-central1` (`SECOND_GEN` instances only)
-     * *  `asia-east1` or `europe-west1`.
-     * Defaults to `us-central` or `us-central1` depending on the instance
-     * type. The region cannot be changed after instance creation.
+     * The geographical region of the Cloud SQL instance.
+     * It can be one of the
+     * [regions](https://cloud.google.com/sql/docs/mysql/locations#location-r)
+     * where Cloud SQL operates:
+     * For example,  `asia-east1`, `europe-west1`, and  `us-central1`.
+     * The default value is `us-central1`.
      *
      * Generated from protobuf field <code>string region = 24;</code>
      * @return string
@@ -1234,12 +1234,12 @@ public function getRegion()
     }
 
     /**
-     * The geographical region. Can be:
-     * *  `us-central` (`FIRST_GEN` instances only)
-     * *  `us-central1` (`SECOND_GEN` instances only)
-     * *  `asia-east1` or `europe-west1`.
-     * Defaults to `us-central` or `us-central1` depending on the instance
-     * type. The region cannot be changed after instance creation.
+     * The geographical region of the Cloud SQL instance.
+     * It can be one of the
+     * [regions](https://cloud.google.com/sql/docs/mysql/locations#location-r)
+     * where Cloud SQL operates:
+     * For example,  `asia-east1`, `europe-west1`, and  `us-central1`.
+     * The default value is `us-central1`.
      *
      * Generated from protobuf field <code>string region = 24;</code>
      * @param string $var
diff --git a/SqlAdmin/src/V1beta4/IpConfiguration/SslMode.php b/SqlAdmin/src/V1beta4/IpConfiguration/SslMode.php
index 784f1b6950e0..a112c0b2aa62 100644
--- a/SqlAdmin/src/V1beta4/IpConfiguration/SslMode.php
+++ b/SqlAdmin/src/V1beta4/IpConfiguration/SslMode.php
@@ -41,6 +41,13 @@ class SslMode
      * client certificates.
      * When this value is used, the legacy `require_ssl` flag must be true or
      * cleared to avoid the conflict between values of two flags.
+     * PostgreSQL clients or users that connect using IAM database
+     * authentication must use either the
+     * [Cloud SQL Auth
+     * Proxy](https://cloud.google.com/sql/docs/postgres/connect-auth-proxy) or
+     * [Cloud SQL
+     * Connectors](https://cloud.google.com/sql/docs/postgres/connect-connectors)
+     * to enforce client identity verification.
      *
      * Generated from protobuf enum <code>TRUSTED_CLIENT_CERTIFICATE_REQUIRED = 3;</code>
      */