PHP Fatal error:  Call to a member function validate() on boolean in GenerateCommand.php on line 94

Tried using your slimapi tools and got the subject error when using the following

```
./vendor/bin/slimapi generate scaffold Users id:integer:2 name:string:128 email:string:128 zone:integer:2 phone:string:12
```

even tried it with

```
./vendor/bin/slimapi generate controller Users

```

Same subject error
