agent/credentials/manager.go
func (roleCredentials *IAMRoleCredentials) GenerateCredentialsEndpointRelativeURI() string {
	return fmt.Sprintf(credentialsEndpointRelativeURIFormat, CredentialsPath, roleCredentials.CredentialsID)
}
func (roleCredentials *IAMRoleCredentials) GenerateCredentialsEndpointRelativeURI() string {
	return fmt.Sprintf(credentialsEndpointRelativeURIFormat, CredentialsPath, roleCredentials.CredentialsID)
}
// GenerateCredentialsEndpointRelativeURI generates the relative URI for the
// credentials endpoint, for a given task id.