✨ feat : Add missing api

Add missing API request function files

Related issue: YJU-OKURA#102

Author: dorimu0

src/api/classUser/getClassMember.ts

@@ -0,0 +1,13 @@
+import req from '../apiUtils';
+
+const getClassMember = async (cid: number) => {
+  const response = await req(
+    `/cu/class/${cid}/members?role=USER`,
+    'get',
+    'gin'
+  );
+
+  return response.data;
+};
+
+export default getClassMember;