aadded User-Course mapping

application/module-language-school/src/main/java/org/fuseri/modulelanguageschool/user/User.java

 package org.fuseri.modulelanguageschool.user;
 
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.JoinTable;
+import jakarta.persistence.ManyToMany;
+import jakarta.persistence.Table;
 import org.fuseri.model.dto.user.Language;
 import org.fuseri.model.dto.user.ProficiencyLevel;
 import org.fuseri.modulelanguageschool.common.DomainObject;
-import jakarta.persistence.*;
 import lombok.*;
+import org.fuseri.modulelanguageschool.course.Course;
 
-import java.util.List;
+import java.util.Map;
+import java.util.Set;
 
 @Getter
 @Setter
@@ -32,6 +42,14 @@ public class User extends DomainObject {
 
     @Embedded
     private Address address;
-    private List<Language> languages;
-    private List<ProficiencyLevel> proficiencyLevels;
-}
+
+    @ManyToMany
+    @JoinTable(name = "myCourses",
+    joinColumns = @JoinColumn(name = "studentId"),
+            inverseJoinColumns = @JoinColumn(name = "courseId")
+    )
+    private Set<Course> courses;
+
+    @ElementCollection
+    private Map<Language,ProficiencyLevel> languageProficiency;
+}
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