You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: api.go
    path of file: ./repos/awless/vendor/github.com/aws/aws-sdk-go/aws/ec2metadata
    
    the code of the file until where you have to start completion: package ec2metadata

import (
	"encoding/json"
	"fmt"
	"net/http"
	"path"
	"strings"
	"time"

	"github.com/aws/aws-sdk-go/aws/awserr"
	"github.com/aws/aws-sdk-go/aws/request"
)

// GetMetadata uses the path provided to request information from the EC
    
func (c *EC2Metadata) GetInstanceIdentityDocument() (EC2InstanceIdentityDocument, error) {
	resp, err := c.GetDynamicData("instance-identity/document")
	if err != nil {
		return EC2InstanceIdentityDocument{},
			awserr.New("EC2MetadataRequestError",
				"failed to get EC2 instance identity document", err)
	}

	doc := EC2InstanceIdentityDocument{}
	if err := json.NewDecoder(strings.NewReader(resp)).Decode(&doc); err != nil {
		return EC2InstanceIdentityDocument{},
			awserr.New("SerializationError",
				"failed to decode EC2 instance identity document", err)
	}

	return doc, nil
}