RFID Master Working, Read the RFID and enter it into the database

src/databasebackend.h

@@ -81,6 +81,43 @@ UserData checkUser(const String& uid) {
     return userData;
 }
 
+//Function to enter user data into the database
+bool enterUserData(const String& uid, const String& firstname, const String& lastname, int alter) {
+    if (!backendOnline()) {
+        Serial.println("No internet connection, cannot enter user data.");
+        return false;
+    }
+
+    HTTPClient http;
+    http.begin(String(BACKEND_SERVER) + "/api/users/insert");
+    http.addHeader("Content-Type", "application/json");
+    http.addHeader("Authorization", String("Bearer ") + BACKEND_TOKEN);
+    
+    // Create JSON payload
+    StaticJsonDocument<256> requestDoc;
+    requestDoc["uid"] = uid;
+    requestDoc["vorname"] = firstname;
+    requestDoc["nachname"] = lastname;
+    requestDoc["alter"] = alter;
+    
+    String requestBody;
+    serializeJson(requestDoc, requestBody);
+    
+    int httpCode = http.POST(requestBody);
+    
+    if (httpCode == HTTP_CODE_CREATED) {
+        Serial.println("User data entered successfully.");
+        http.end();
+        return true;
+    } else {
+        Serial.printf("Failed to enter user data, HTTP code: %d\n", httpCode);
+        http.end();
+        return false;
+    }
+}
+
+
+
 // Keep this for backward compatibility
 bool userExists(const String& uid) {
     return checkUser(uid).exists;