modding #1858

(cherry picked from commit 2abeb38d64)

src/server/components/auth.js

@@ -260,6 +260,7 @@ module.exports = {
 
 		if (credentials.username === '' || credentials.password === '') {
 			msg.callback(messages.login.allFields);
+
 			return;
 		}
 
@@ -279,6 +280,18 @@ module.exports = {
 			msg.callback(messages.login.incorrect);
 			return;
 		}
+
+		const emBeforeLogin = {
+			obj: this.obj,
+			success: true,
+			msg: null
+		};
+		await eventEmitter.emit('onBeforeLogin', emBeforeLogin);
+		if (!emBeforeLogin.success) {
+			msg.callback(emBeforeLogin.msg);
+
+			return;
+		}
 		
 		this.username = username;
 		await cons.logOut(this.obj);