added login suppport

src/database/database.cpp

@@ -88,7 +88,7 @@ set<string> Database::getStrSet(const string& sql){
     return vec;
 }
 
-std::optional<int64_t> Database::insert(const char* sql) {
+std::optional<int64_t> Database::insert(const std::string& sql) {
     sqlite3_stmt* stmt = prepareStmt(sql);
     if (stmt == nullptr)
         return {}; 

src/database/database.hpp

@@ -21,7 +21,7 @@ public:
     bool exec(const char* sqlQuery);
     bool exec(const std::string& sqlQuery);
 
-    std::optional<int64_t> insert(const char* sql);
+    std::optional<int64_t> insert(const std::string& sql);
 
     std::set<std::string> getStrSet(const std::string& sql);