code: function _createNewFacebookUser() {
      var avatar = '',
          excludedFields = ['link', 'email', 'first_name', 'last_name','picture'],
          newUser;
  
      //Set Image
      if(this.socialUserInfo.picture && this.socialUserInfo.picture.data && this.socialUserInfo.picture.data.url !== ''){
          avatar = this.socialUserInfo.picture.data.url;
      }
  
      newUser = {
          role: 'external',
          identities: {
              facebook: {
                  id: this.socialUserInfo.id,
                  accessToken: this.creds.access_token,
                  expiresIn: this.creds.expires
              }
          },
          linkedidentities: ['facebook'],
          profile: {
              picture: avatar
          },
          enabled: true,
          email: this.socialUserInfo.email,
          firstname: this.socialUserInfo.first_name,
          lastname: this.socialUserInfo.last_name
      };
  
      _.each(profileFieldsArr, function(field){
          if(excludedFields.indexOf(field) === -1){
              newUser.profile[field] = this.socialUserInfo[field];
          }
      }.bind(this));
  
      return db.users.insert(newUser);
  }
docs: Function that takes the facebook social data and attaches it to a user in grasshopper