Please keep in mind, you use this plugin and this service AS IS, withouth any guaranties that everything will be OK.
Warning ! You should have REST api Extension. You can take it here
Also because of laziness, an PersonalVars plugin is now need as dependecy plugin on your server, install it here
SNC_HasDiscordID(client) - check if player have account at steamncord.xyz site.
SNC_GetDiscordID(client, char[] string here) - return player Discord ID as string.
SNC_AreServerMember(client) - check if player are member of your discord server defined in SNC_Core.cfg
SNC_HasRoleID(client, char[] roleid) - check if player has role on your server.
AS ONLY as you loaded plugin on server, modify SNC_Core.cfg config file in /cfg/sourcemod/ folder and insert your server discord ID in to it like: SNC_ServerID "563362438154813450"
Then restart plugin and reconnect to server.