优化后端，实现前端添加用户

tone-page-web/lib/api/admin/user/create.ts

@@ -1,3 +1,20 @@
-export function create() {
+import { User } from "@/lib/types/user";
+import fetcher from "../../fetcher";
 
+interface createUserParams {
+    username: string | null;
+    nickname: string | null;
+    email: string | null;
+    phone: string | null;
+    password: string | null;
+}
+
+export async function create(data: createUserParams) {
+    return fetcher<User>("/api/admin/user", {
+        method: "POST",
+        body: JSON.stringify(data),
+        headers: {
+            "Content-Type": "application/json",
+        },
+    });
 }