code: func (s *OrganizationsService) ListOrgMemberships(ctx context.Context, opt *ListOrgMembershipsOptions) ([]*Membership, *Response, error) {
  	u := "user/memberships/orgs"
  	u, err := addOptions(u, opt)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	var memberships []*Membership
  	resp, err := s.client.Do(ctx, req, &memberships)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return memberships, resp, nil
  }
docs: // ListOrgMemberships lists the organization memberships for the authenticated user.
  //
  // GitHub API docs: https://developer.github.com/v3/orgs/members/#list-your-organization-memberships