class<\/span> User<\/span> <<\/span> ActiveRecord<\/span>::<\/span>Base<\/span><\/div> include<\/span> Clearance<\/span>::<\/span>App<\/span>::<\/span>Models<\/span>::<\/span>User<\/span><\/div> <\/div> attr_accessible<\/span> :username<\/span><\/div> <\/div> validates_presence_of<\/span> :username<\/span><\/div> validates_uniqueness_of<\/span> :username<\/span><\/div>end<\/span><\/div><\/pre><\/div>\n \n <\/div>\n\n