node_modules/mysql/lib/protocol/Parser.js:82
        throw err;
        ^

TypeError: Cannot read property 'slice' of null
    at Object.GEOMETRY.parse.GEOMETRY.parse [as GEOMETRY] 

users:
    ID: {
      type: 'CHAR(36)',
      allowNull: false,
      defaultValue: '',
      primaryKey: true
    },
    groupID: {
      type: type: 'CHAR(36)',
      allowNull: false
    },

groups:
    ID: {
      type: 'CHAR(36)',
      allowNull: false,
      defaultValue: '',
      primaryKey: true
    },
    location: {
      type: DataTypes.GEOMETRY,
      allowNull: false
    }

db.users.belongsTo(db.groups,{foreignKey:'groupID',targetKey:'ID'});

 let userInfo = yield db.users.findAll({
    include: [db.groups]
  });

    value = value.buffer();
    if (value == null) {
      return null;
    }

    value = value.slice(4);