生成表结构，开始实现接口逻辑

internal/model/admin.go

@@ -0,0 +1,15 @@
+package model
+
+type (
+	AdminLoginIn struct {
+		Username string
+		Password string
+	}
+
+	AdminInfoIn struct {
+		Id int
+	}
+	AdminInfoOut struct {
+		Token string
+	}
+)