Projects = new Mongo.Collection('projects');

Meteor.methods({
  insertProject: function(projectAttributes) {
    check(Meteor.userId(), String);
    check(projectAttributes, {
      name: Match.Where(function(val) {
        check(val, String);
        return val.length > 0;
      }),
      description: String
    });

    var ownerAttributes = {
      userId: Meteor.userId(),
      username: Meteor.user().username
    };

    var project = _.extend(projectAttributes, {
      owner: ownerAttributes,
      members: [],
      tasks: [],
      createdAt: new Date()
    });

    var projectId = Projects.insert(project);

    return {
      _id: projectId
    };
  },

  addUserToProject: function(requestAttributes) {
    check(Meteor.userId(), String);
    check(requestAttributes, {
      userId: String,
      requestingUserId: String,
      requestId: String,
      projectId: String,
      notificationId: String
    });

    Projects.update({
                      _id : requestAttributes.projectId
                    }, {
                      $addToSet: {
                        members: requestAttributes.requestingUserId
                      }
                    });

    Meteor.call('setNotificationAsRead', requestAttributes.notificationId, function(err, result) {
      if (err) {
        console.log(err);
      }
    });
  }
});

@@ -1175,24 +1175,116 @@
        %7D);%0A%0A
+    Requests.update(%7B_id: requestAttributes.requestId%7D, %7B%0A      status: 'accepted'%0A    %7D);%0A%0A
     Meteor.c

Update request status to 'accepted'