fix username in login field -- should be 'username' not 'name'

api/auth.go

@@ -15,7 +15,7 @@ func Login(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	username := r.FormValue("name")
+	username := r.FormValue("username")
 	password := r.FormValue("password")
 	if username == "" || password == "" {
 		http.Error(w, "Username and password cannot be empty", http.StatusBadRequest)