Here are the list of functions that you can use with this API:

1) get_player_level(userdata): Returns Player Level variable from the specified player.

2) set_player_level(userdata, level): Sets a specified player Level variable to the specified player.

3) get_player_exp(userdata): Returns EXP variable from the specified player.

4) set_player_exp(userdata, exp): Sets a specified EXP variable to the specified player.

5) add_player_exp(userdata, exp): Adds a specified ammount of EXP variable to the specified player.

6) get_player_required_exp(userdata): Returns the Required EXP variable to level up for the specified player.

7) check_player_current_level(userdata): Function that checks/verifies/updates if specified player is ready for a level up.