feat(e2e): add fixtures and data seeding

e2e/data/user.ts

@@ -0,0 +1,20 @@
+import axios, { AxiosError } from "axios"
+
+axios.defaults.baseURL = "http://localhost:3000"
+
+export async function seedUser (username?: string, password?: string, name?: string) {
+  try {
+    return await axios.post("/api/v1/users", {
+      username: username || "test",
+      password: password || "password",
+      name: name || "Test User",
+    })
+  } catch (e: any) {
+    if (e instanceof AxiosError) {
+      if (e.response?.status === 400) {
+        return
+      }
+    }
+    throw e
+  }
+}