fix for overwriting email signup user

src/db/models/userModels.js

@@ -132,6 +132,21 @@ export const addCoursePurchaseToUser = async (userId, purchaseData) => {
 };
 
 export const createUser = async (data) => {
+  // Check if a user with the given email already exists
+  let existingUser = null;
+  // todo: special condition for email login, should be handled before getting here
+  if (data?.email) {
+    existingUser = await prisma.user.findUnique({
+      where: { email: data?.email },
+    });
+  }
+
+  if (existingUser) {
+    // If user exists, return the existing user
+    return existingUser;
+  }
+
+  // If user does not exist, create a new user
   return await prisma.user.create({
     data: {
       ...data,

src/hooks/tracking/useCheckCourseProgress.js

@@ -10,7 +10,7 @@ const useCheckCourseProgress = () => {
       if (!session?.user) return;
 
       const userId = session.user.id;
-      const userCourses = session.user.userCourses;
+      const userCourses = session.user?.userCourses || [];
 
       for (const userCourse of userCourses) {
         const courseId = userCourse.courseId;