async fn get_relational_database_master_user_password(
        &self,
        input: GetRelationalDatabaseMasterUserPasswordRequest,
    ) -> Result<
        GetRelationalDatabaseMasterUserPasswordResult,
        RusotoError<GetRelationalDatabaseMasterUserPasswordError>,
    > {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header(
            "x-amz-target",
            "Lightsail_20161128.GetRelationalDatabaseMasterUserPassword",
        );
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(
                request,
                GetRelationalDatabaseMasterUserPasswordError::from_response,
            )
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response)
            .deserialize::<GetRelationalDatabaseMasterUserPasswordResult, _>()
    }
<p>Returns the current, previous, or pending versions of the master user password for a Lightsail database.</p> <p>The <code>GetRelationalDatabaseMasterUserPassword</code> operation supports tag-based access control via resource tags applied to the resource identified by relationalDatabaseName.</p>
rusoto/services/lightsail/src/generated.rs