feat: add user model, repository and controller

Author: OLuwis

src/main/java/com/luwis/application/Application.java

@@ -0,0 +1,14 @@
+package com.luwis.application;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
+
+@SpringBootApplication(exclude = { SecurityAutoConfiguration.class })
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}

src/main/java/com/luwis/application/user/UserController.java

@@ -0,0 +1,20 @@
+package com.luwis.application.user;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.graphql.data.method.annotation.Argument;
+import org.springframework.graphql.data.method.annotation.MutationMapping;
+import org.springframework.stereotype.Controller;
+
+@Controller
+public class UserController {
+
+    @Autowired
+    private UserRepository userRepository;
+    
+    @MutationMapping
+    public UserModel userSignup(@Argument String username, @Argument String email, @Argument String password) {
+        UserModel newUser = new UserModel(username, email, password);
+        return userRepository.save(newUser);
+    }
+
+}

src/main/java/com/luwis/application/user/UserModel.java

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+package com.luwis.application.user;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+
+@Entity
+public class UserModel {
+    
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String username;
+    private String email;
+    private String password;
+
+    protected UserModel() {}
+
+    public UserModel(String username, String email, String password) {
+        this.username = username;
+        this.email = email;
+        this.password = password;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("UserModel[id=%d, username='%s', email='%s', password='%s']", id, username, email, password);
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+    
+}

src/main/java/com/luwis/application/user/UserRepository.java

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+package com.luwis.application.user;
+
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends CrudRepository<UserModel, Long> {
+    
+}