diff --git a/challenge-1/submissions/brenoamin/solution-template.go b/challenge-1/submissions/brenoamin/solution-template.go
new file mode 100644
index 000000000..479c17741
--- /dev/null
+++ b/challenge-1/submissions/brenoamin/solution-template.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	var a, b int
+	// Read two integers from standard input
+	_, err := fmt.Scanf("%d, %d", &a, &b)
+	if err != nil {
+		fmt.Println("Error reading input:", err)
+		return
+	}
+
+	// Call the Sum function and print the result
+	result := Sum(a, b)
+	fmt.Println(result)
+}
+
+// Sum returns the sum of a and b.
+func Sum(a int, b int) int {
+	return a + b
+}
diff --git a/challenge-5/solution-template.go b/challenge-5/solution-template.go
index b915a164c..0ce6302f0 100644
--- a/challenge-5/solution-template.go
+++ b/challenge-5/solution-template.go
@@ -12,11 +12,16 @@ const validToken = "secret"
 // Otherwise, respond with 401 Unauthorized.
 func AuthMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		// TODO: Implement the logic:
-		//  1) Grab the "X-Auth-Token" header
-		//  2) Compare against validToken
-		//  3) If mismatch or missing, respond with 401
-		//  4) Otherwise pass to next handler
+		authHeader := r.Header.Get("X-Auth-Token")
+		if authHeader == "" {
+			w.WriteHeader(http.StatusUnauthorized)
+			return
+		}
+
+		if authHeader == validToken {
+			next.ServeHTTP(w, r)
+		}
+		w.WriteHeader(http.StatusUnauthorized)
 	})
 }
 
@@ -47,5 +52,8 @@ func SetupServer() http.Handler {
 
 func main() {
 	// Optional: you can run a real server for local testing
-	// http.ListenAndServe(":8080", SetupServer())
+	err := http.ListenAndServe(":8080", SetupServer())
+	if err != nil {
+		fmt.Println(err)
+	}
 }