add: 登录

src/main/java/com/dota/nexus/entity/LoginDTO.java

@@ -0,0 +1,4 @@
+package com.dota.nexus.entity;
+
+public record LoginDTO(String username, String password) {
+}

src/main/java/com/dota/nexus/entity/R.java

@@ -27,8 +27,12 @@ public class R {
 		return new R(200, "ok", data);
 	}
 
+    public static R error(String msg){
+        return new R(500, msg);
+    }
+
     public static R error(){
-        return new R(500, "服务端发生未知错误");
+        return error("服务端发生未知错误");
     }
 
     public static R unauthorized() {

src/main/java/com/dota/nexus/entity/User.java

@@ -0,0 +1,14 @@
+package com.dota.nexus.entity;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+@EqualsAndHashCode(callSuper = true)
+@Data
+public class User extends Entity{
+    private String name;
+
+    private String password;
+
+    private String nickname;
+}