feat: user related logic refactor

src/main/java/xin/merlin/myplayerbackend/entity/GroupInfo.java

@@ -0,0 +1,16 @@
+package xin.merlin.myplayerbackend.entity;
+
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+
+@Data
+@TableName("groupinfo")
+public class GroupInfo {
+    @TableId("g_id")
+    private Integer g_id;
+
+    private String g_name;
+    private String g_introduction;
+    private String g_avatar;
+}