//Example use of the validator package's contain method
validate(value){
      if(validator.isEmpty(value)){
        throw new Error('Please enter your password!')
      }else if(validator.equals(value.toLowerCase(),"password")){
        throw new Error('Password is invalid!')
      }else if(validator.contains(value.toLowerCase(), "password")){
        throw new Error('Password should not contain password!')
      }
    }