moved credential definition in seperate file

src/Credentials.cpp

@@ -0,0 +1,16 @@
+//
+// Created by lukas on 11.02.20.
+//
+
+#include <Credentials.h>
+
+std::string Credentials::dynuapikey = "";
+std::string Credentials::domainid = ""; //id of the dynu domain
+std::string Credentials::domainname = "";
+
+std::string Credentials::telegramApiKey = "";
+std::string Credentials::chatId = "";
+
+bool Credentials::checkCredentialValidity() {
+    return !(Credentials::dynuapikey.empty() || Credentials::domainid.empty() || Credentials::domainname.empty());
+}