resolved issue #178(switch from GET->POST if payload exists)

[JeetDalal]

PR Description

This PR is with respect to the issue #178 . I have resolved the issue and also added the relevant test cases. I also gone through the contributing guidelines provided by you.

The final results are as follows:

https://github.com/user-attachments/assets/daf6db51-440d-4a22-9936-1e574d8d3139

And the test case results:

Related Issues

• Related Issue #
• Closes #

Checklist

• [✅] I have gone through the contributing guide
• [✅] I have updated my branch and synced it with project main branch before making this PR
• [✅] I have run the tests (flutter test) and all tests are passing

Added/updated tests?

We encourage you to add relevant test cases.

• [✅] Yes
• [ ] No, and this is why: please replace this line with details on why tests have not been included