async fn register_instance(
        &self,
        input: RegisterInstanceRequest,
    ) -> Result<RegisterInstanceResult, RusotoError<RegisterInstanceError>> {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header("x-amz-target", "OpsWorks_20130218.RegisterInstance");
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, RegisterInstanceError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response).deserialize::<RegisterInstanceResult, _>()
    }
<p>Registers instances that were created outside of AWS OpsWorks Stacks with a specified stack.</p> <note> <p>We do not recommend using this action to register instances. The complete registration operation includes two tasks: installing the AWS OpsWorks Stacks agent on the instance, and registering the instance with the stack. <code>RegisterInstance</code> handles only the second step. You should instead use the AWS CLI <code>register</code> command, which performs the entire registration operation. For more information, see <a href="https://docs.aws.amazon.com/opsworks/latest/userguide/registered-instances-register.html"> Registering an Instance with an AWS OpsWorks Stacks Stack</a>.</p> </note> <p>Registered instances have the same requirements as instances that are created by using the <a>CreateInstance</a> API. For example, registered instances must be running a supported Linux-based operating system, and they must have a supported instance type. For more information about requirements for instances that you want to register, see <a href="https://docs.aws.amazon.com/opsworks/latest/userguide/registered-instances-register-registering-preparer.html"> Preparing the Instance</a>.</p> <p> <b>Required Permissions</b>: To use this action, an IAM user must have a Manage permissions level for the stack or an attached policy that explicitly grants permissions. For more information on user permissions, see <a href="https://docs.aws.amazon.com/opsworks/latest/userguide/opsworks-security-users.html">Managing User Permissions</a>.</p>
rusoto/services/opsworks/src/generated.rs