func NewStatic(id, secret, token string, signerType SignatureType) *Credentials {
	return New(&Static{
		Value: Value{
			AccessKeyID:     id,
			SecretAccessKey: secret,
			SessionToken:    token,
			SignerType:      signerType,
		},
	})
}
NewStatic returns a pointer to a new Credentials object
wrapping a static credentials value provider.
package credentials
type Static struct {
	Value
}
func NewStaticV2(id, secret, token string) *Credentials {
	return NewStatic(id, secret, token, SignatureV2)
}
func NewStaticV4(id, secret, token string) *Credentials {
	return NewStatic(id, secret, token, SignatureV4)
}