出现此问题的原因是API Gateway无法正确识别路由。可以在API Gateway中创建一个新的路由，然后将其与现有集成关联。或者可以改变现有路由和默认路由之间的优先级。

以下是示例代码：

// 定义路由和API endpoint
const routes = {
  "GET /users": "getAllUsers",
  "GET /users/:id": "getUserById",
  "POST /users": "createUser",
  "PUT /users/:id": "updateUser",
  "DELETE /users/:id": "deleteUser"
};

// 定义API Gateway集成
const apiGateway = {
  "getAllUsers": "arn:aws:lambda:getAllUsers",
  "getUserById": "arn:aws:lambda:getUserById",
  "createUser": "arn:aws:lambda:createUser",
  "updateUser": "arn:aws:lambda:updateUser",
  "deleteUser": "arn:aws:lambda:deleteUser",
  "$default": "arn:aws:lambda:defaultFunction"
};

// 创建API Gateway路由
Object.keys(routes).forEach((key) => {
  const [method, path] = key.split(" ");

  const integration = apiGateway[routes[key]];

  const route = {
    "restApiId": "123456abc",
    "parentId": "789012def",
    "pathPart": path,
    "method": method,
    "authorizationType": "NONE",
    "integration": {
      "type": "AWS_PROXY",
      "uri": `arn:aws:apigateway:us-east-1:lambda:path/2015-03-31/functions/${integration}/invocations`
    },
    "apiKeyRequired": false
  };

  // 创建路由
  const createdRoute = AWS.APIGateway.createResource(route);
  console.log(`Created route ${path} with ID ${createdRoute.id}`);
});

// 将现有路由和默认路由之间的优先级更改为默认优先级
AWS.APIGateway.updateIntegration({
  restApiId: "123456abc",
  resourceId: "789012def",
  httpMethod: