# Day 18 30 Days of Postman Challenge **URL:** \ **Category:** Help Hub\ **Tags:** collections, api\ **Created:** [December 12, 2023, 4:01am UTC](https://community.postman.com/t/day-18-30-days-of-postman-challenge/55566 "2023-12-12T04:01:05Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![jai-shree-jain](https://avatars.discourse-cdn.com/v4/letter/j/eada6e/32.png) [@jai-shree-jain](https://community.postman.com/u/jai-shree-jain)\ **Post date:** [December 12, 2023, 4:01am UTC](https://community.postman.com/t/day-18-30-days-of-postman-challenge/55566/1 "2023-12-12T04:01:05Z")
In this API specification Challenge , I was getting this error relating to issues and I found that these terms constructing the header where not there in my yaml document . ![image](https://us1.discourse-cdn.com/getpostman/original/3X/5/3/53c65ccdeb2eefd8ca8975b88e1a9a86f4ba316e.png) So I included them ![Screenshot 2023-12-12 092128](https://us1.discourse-cdn.com/getpostman/original/3X/2/b/2b005e1479f43b4f77022a80cbb88b7820ef7f25.png) But still I was getting error terming that headers is an invalid property ![Screenshot 2023-12-12 092137](https://us1.discourse-cdn.com/getpostman/original/3X/c/e/cecc91747a680cfe55f11f3caec6211e2f89577a.png) I am genuinely not able to understand how to solve these issues or how to proceed ? **My collection ID** - 63090859-79f5-4aa6-8a69-04566b48ad5a Any small hints related to this would be highly appreciating . I have checked out the resources section too , but there too I can’t find how to solve these issues . Thank you ---
**Author:** ![danny-dainton](https://sea2.discourse-cdn.com/getpostman/user_avatar/community.postman.com/danny-dainton/32/29401_2.png) [@danny-dainton](https://community.postman.com/u/danny-dainton)\ **Post date:** [December 12, 2023, 1:09pm UTC](https://community.postman.com/t/day-18-30-days-of-postman-challenge/55566/2 "2023-12-12T13:09:37Z")
Hey @jai-shree-jain 👋 Welcome to the Postman Community! :postman: Could you share the Public Workspace link, please? It would be easier to see what’s happening here. You can get this by hovering over the _Workspace name_ on the _Overview_ tab and clicking the copy icon: ![image](https://us1.discourse-cdn.com/getpostman/original/3X/e/e/ee393cca97ed2ce2e4108a04ef8f3f8c2596e626.png) ---
**Author:** ![jai-shree-jain](https://avatars.discourse-cdn.com/v4/letter/j/eada6e/32.png) [@jai-shree-jain](https://community.postman.com/u/jai-shree-jain)\ **Post date:** [December 12, 2023, 1:58pm UTC](https://community.postman.com/t/day-18-30-days-of-postman-challenge/55566/3 "2023-12-12T13:58:21Z")
Link [Postman](https://www.postman.com/dark-flare-852441/workspace/30-day-challenge-starting-from-8th-december) ---
**Author:** ![danny-dainton](https://sea2.discourse-cdn.com/getpostman/user_avatar/community.postman.com/danny-dainton/32/29401_2.png) [@danny-dainton](https://community.postman.com/u/danny-dainton)\ **Post date:** [December 12, 2023, 3:28pm UTC](https://community.postman.com/t/day-18-30-days-of-postman-challenge/55566/4 "2023-12-12T15:28:24Z")
The days task is more about getting familiar with APIs within Postman, Importing spec files, the collections that get auto generated and just generally showing you what that feature could do for you. > **[Design your API in Postman using the API Builder | Postman Learning Center](https://learning.postman.com/docs/designing-and-developing-your-api/the-api-workflow/)** > > Design your API in Postman using the API Builder: documentation for Postman, the collaboration platform for API development. Create better APIs—faster. You don’t necessarily need to correct all the errors that you might see in the schema or request. > If you see any issues, think about how you might resolve them. If you submit your api and collection id’s in the solution checker - Are you seeing any errors? ---
**Author:** ![jai-shree-jain](https://avatars.discourse-cdn.com/v4/letter/j/eada6e/32.png) [@jai-shree-jain](https://community.postman.com/u/jai-shree-jain)\ **Post date:** [December 12, 2023, 4:15pm UTC](https://community.postman.com/t/day-18-30-days-of-postman-challenge/55566/5 "2023-12-12T16:15:35Z")
Yess , got it . Finally it is solved . Thank you @danny-dainton ---
**Author:** ![system](https://sea2.discourse-cdn.com/getpostman/user_avatar/community.postman.com/system/32/29796_2.png) [@system](https://community.postman.com/u/system)\ **Post date:** [December 15, 2023, 4:16pm UTC](https://community.postman.com/t/day-18-30-days-of-postman-challenge/55566/6 "2023-12-15T16:16:25Z")
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