Adjusted .yml files

ERCoupons/resources/plugin.yml

@@ -7,4 +7,5 @@ main: ${project.groupId}.${project.artifactId}.Main
 commands:
   ${project.name}:
     description: command reserved for plugin
+    aliases: [coupon, coupons, ercoupon]
   

ERCoupons/resources/server.yml

@@ -1,5 +1,5 @@
 # Plugin config
-
+api-key: "CRAFTINGSTORE KEY HERE"
 
 # Version is used for future updates
 version: 1