coherence provides an API and a database for storing key-value pairs from within game sessions.
The key-value store provides a simple way to store and retrieve data for the currently logged in player. For example, you could store the player's score, email address, or any other data.
The keys must be alphanumerical strings, underscore or dash. Currently, only strings are accepted as values. If you need to store numbers or complex types like arrays, you have to convert them to strings.
The total amount of stored data (keys + values) cannot exceed 256 KB per player (TBD).
There is no limit how often the data is stored or retrieved.