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