Not able to successfully compile. Undefined references to cpr

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "cpr"]
+	path = cpr
+	url = https://github.com/whoshuu/cpr.git

src/Main.cpp

@@ -35,11 +35,12 @@ int main(int argc, char** argv)
 	}
 
 	cout<<"Song path: "<<songPath<<endl;
+	FileManager fm{songPath};
+	fm.saveFile(newSongPath);
+
 	Upload upS{songPath};
 	upS.uploadSong();
 
-	FileManager fm{songPath};
-	fm.saveFile(newSongPath);
 
 
 	return 0;

src/Syncers/Download.cpp

@@ -0,0 +1,3 @@
+#include"Download.h"
+
+Download::Download() { }

src/Syncers/Download.h

@@ -0,0 +1,16 @@
+#ifndef DOWNLOAD_H_
+#define DOWNLOAD_H_
+
+#include<iostream>
+
+namespace Syncers
+{
+	class Download
+	{
+	public:
+		Download();
+	private:
+	}
+}
+
+#endif

src/Syncers/Upload.cpp

@@ -1,6 +1,7 @@
 #include<iostream>
 #include<string>
 
+#include<cpr/cpr.h>
 #include<nlohmann/json.hpp>
 
 #include"Upload.h"
@@ -11,12 +12,15 @@ using std::string;
 
 using json = nlohmann::json;
 
+using namespace cpr;
+
 namespace Syncers
 {
 	Upload::Upload() { }
 	Upload::Upload(string filePath)
 	{
-		this->fMgr = Managers::FileManager{filePath};
+		this->songPath = filePath;
+		this->fMgr = Managers::FileManager(songPath);
 	}
 
 
@@ -26,6 +30,13 @@ namespace Syncers
 		json jObj = serializeObject();
 		printJsonData(jObj);
 
+		std::string url = apiUrl + apiEndPoint;
+
+		auto r = cpr::Post(cpr::Url{url},
+                   cpr::Multipart{{"key", "file"},
+                                  {"value", cpr::File{songPath}}});
+		cout << r.text << std::endl;
+
 	}
 
 	void Upload::configureSong()

src/Syncers/Upload.h

@@ -23,7 +23,8 @@ namespace Syncers
 			Managers::FileManager fMgr;
 			Models::Song song;
 			std::string apiUrl{"http://192.168.1.24"};
-			std::string apiEndPoint{"/api/song"};
+			std::string apiEndPoint{"/api/song/data"};
+			std::string songPath;
 			int port{9349};
 
 			void configureSong();