func NewProviderClient(cfg aws.Config, handlers request.Handlers, endpoint string, options ...func(*Provider)) credentials.Provider {
	p := &Provider{
		Client: client.New(
			cfg,
			metadata.ClientInfo{
				ServiceName: "CredentialsEndpoint",
				Endpoint:    endpoint,
			},
			handlers,
		),
	}
	p.Client.Handlers.Unmarshal.PushBack(unmarshalHandler)
	p.Client.Handlers.UnmarshalError.PushBack(unmarshalError)
	p.Client.Handlers.Validate.Clear()
	p.Client.Handlers.Validate.PushBack(validateEndpointHandler)
	for _, option := range options {
		option(p)
	}
	return p
}
NewProviderClient returns a credentials Provider for retrieving AWS credentials
from arbitrary endpoint.
package endpointcreds
import (
	"encoding/json"
	"time"
	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/awserr"
	"github.com/aws/aws-sdk-go/aws/client"
	"github.com/aws/aws-sdk-go/aws/client/metadata"
	"github.com/aws/aws-sdk-go/aws/credentials"
	"github.com/aws/aws-sdk-go/aws/request"
	"github.com/aws/aws-sdk-go/private/protocol/json/jsonutil"
)
const ProviderName = `CredentialsEndpointProvider`
type Provider struct {
	staticCreds bool
	credentials.Expiry
	Client *client.Client
	ExpiryWindow time.Duration
	AuthorizationToken string
}