Create CRUD for Account

project/backend_springboot/src/main/java/pl/dmcs/eldarmuk/backend_springboot/model/Account.java

@@ -0,0 +1,54 @@
+package pl.dmcs.eldarmuk.backend_springboot.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+
+@Entity
+public class Account {
+    @Id
+    private Long id;
+    private String username;
+    private String password;
+    private String email;
+
+    public Account() {}
+
+    public Account(Long id, String username, String password, String email) {
+        this.id = id;
+        this.username = username;
+        this.password = password;
+        this.email = email;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+}

project/backend_springboot/src/main/java/pl/dmcs/eldarmuk/backend_springboot/repository/AccountRepository.java

@@ -0,0 +1,12 @@
+package pl.dmcs.eldarmuk.backend_springboot.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+import pl.dmcs.eldarmuk.backend_springboot.model.Account;
+import java.util.Optional;
+
+@Repository
+public interface AccountRepository extends JpaRepository<Account, Long> {
+    Boolean existsByUsername(String username);
+    Optional<Account> findByUsername(String username);
+}