GitLab

1. During the conversion of Morphia calls to the new API, some of the `Filter.eq()` calls had their `field` set to `playerId` due to a copy/paste typo.

2. Morphia 2 switches to the codec system, so anything that will be serialized in the pipeline requires the `@Entity` annotation.

Fix issue with a player not being able to spawn when they join somone in co-op with a singleplayer team of more than the max allowed amount