Blake Erickson ec2930712d
FIX: 500 error when creating a user with an integer username (#16370)
Via the API it is possible to create a user with an integer username. So
123 instead of "123". This causes the following 500 error:

```
NoMethodError (undefined method `unicode_normalize' for 1:Integer)
app/models/user.rb:276:in `normalize_username'
```

See: https://meta.discourse.org/t/222281
2022-04-04 15:15:32 -06:00
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