How to use the card.consumers function in card

model: function(){
    return card.consumers.authenticatedGithubApi.getRepositories();
  }
});

findByRepositoryNameAndGithubLogin: function(repositoryName, githubLogin) {
    return card.consumers.authenticatedGithubApi.request("ajax", {
      url: '/repos/' + repositoryName + '/issues?creator=' + githubLogin,
      dataType: 'json'
    });
  },

findAllByRepositoryName: function(repositoryName) {
    var service;

    if (card.data.user) {
      service = card.consumers.authenticatedGithubApi;
    } else {
      service = card.consumers.unauthenticatedGithubApi;
    }

    return service.request("ajax", {
      url: '/repos/' + repositoryName + '/issues',
      dataType: 'json'
    });
  },

getApiConsumer: function(user){
    return user ? card.consumers.authenticatedGithubApi : card.consumers.unauthenticatedGithubApi;
  },
  findByRepositoryName: function(repositoryName, user) {