feat&fix: fix build and add initial authnetication

test/test1.c

@@ -1,7 +1,19 @@
+#include "discord.h"
+#include "error.h"
+
 #include <stdio.h>
 
 int main(void) {
-	puts("discord.c");
+	puts("discord.c example");
+
+	const char token[] = "";
+
+	discord_client client;
+	discord_error err = discord_init(&client, token);
+	if (err != DISCORD_OK) {
+		fprintf(stderr, "discord_init(): %s\n", discord_err_str(err));
+		return -1;
+	}
 
 	return 0;
 }